diff --git a/docs/화면관리_시스템_설계.md b/docs/화면관리_시스템_설계.md
index 1c72c952..67e82fba 100644
--- a/docs/화면관리_시스템_설계.md
+++ b/docs/화면관리_시스템_설계.md
@@ -30,6 +30,17 @@
 - **실시간 미리보기**: 설계한 화면을 실제 화면과 동일하게 확인 가능
 - **메뉴 연동**: 각 회사의 메뉴에 화면 할당 및 관리
 
+### 🆕 최근 업데이트 (요약)
+
+- **픽셀 기반 자유 이동**: 격자 스냅을 제거하고 커서를 따라 정확히 이동하도록 구현. 그리드 라인은 시각적 가이드만 유지
+- **멀티 선택 강화**: Shift+클릭 + 드래그 박스(마키)로 다중선택 가능. 그룹 컨테이너는 선택에서 자동 제외
+- **다중 드래그 이동**: 다중선택 항목을 함께 이동(상대 위치 유지). 스크롤/그랩 오프셋 반영으로 튐 현상 제거
+- **그룹 UI 간소화**: 그룹 헤더/테두리 박스 제거(투명 컨테이너). 그룹 내부에만 집중
+- **그룹 내 정렬/분배 툴**: 좌/가로중앙/우, 상/세로중앙/하 정렬 + 가로/세로 균등 분배 추가(아이콘 UI)
+- **왼쪽 목록 UX**: 검색·페이징 도입으로 대량 테이블 로딩 지연 완화
+- **Undo/Redo**: 최대 50단계, 단축키(Ctrl/Cmd+Z, Ctrl/Cmd+Y)
+- **위젯 타입 렌더링 보강**: code/entity/file 포함 실제 위젯 형태로 표시
+
 ### 🎯 **현재 테이블 구조와 100% 호환**
 
 **기존 테이블 타입관리 시스템과 완벽 연계:**
@@ -571,6 +582,8 @@ size: { width: number; height: number };
 
 ### 2. 컴포넌트 배치 로직
 
+현재 배치 로직은 **픽셀 기반 자유 위치**로 동작합니다. 마우스 그랩 오프셋과 스크롤 오프셋을 반영하여 커서를 정확히 추적합니다. 아래 그리드 기반 예시는 참고용이며, 실제 런타임에서는 스냅을 적용하지 않습니다.
+
 ```typescript
 // 그리드 기반 배치
 function calculateGridPosition(
@@ -1171,6 +1184,13 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
   }, [undo, redo]);
 ```
 
+#### 선택/이동 UX (현행)
+
+- Shift+클릭으로 다중선택 가능
+- 캔버스 빈 영역 드래그로 **마키 선택** 가능(Shift 누르면 기존 선택에 추가)
+- 다중선택 상태에서 드래그 시 전체가 함께 이동(상대 좌표 유지)
+- 그룹 컨테이너는 선택/정렬 대상에서 자동 제외
+
 // 컴포넌트 추가
 const addComponent = (component: ComponentData) => {
 setLayout((prev) => ({
@@ -2265,26 +2285,31 @@ export class TableTypeIntegrationService {
 
 - **직관적 인터페이스**: 드래그앤드롭 기반 화면 설계
 - **실시간 피드백**: 컴포넌트 배치 즉시 미리보기 표시
-- **키보드 지원**: Ctrl+Z/Ctrl+Y 단축키로 빠른 작업
+- **다중선택**: Shift+클릭 및 마키 선택 지원, 다중 드래그 이동
+- **정렬/분배**: 그룹 내 좌/중앙/우·상/중앙/하 정렬 및 균등 분배
+- **키보드 지원**: Ctrl/Cmd+Z, Ctrl/Cmd+Y 단축키
 - **반응형 UI**: 전체 화면 활용한 효율적인 레이아웃
 
 ## 🚀 다음 단계 계획
 
 ### 1. 컴포넌트 그룹화 기능
 
-- [ ] 여러 위젯을 컨테이너로 그룹화
-- [ ] 부모-자식 관계 설정
-- [ ] 그룹 단위 이동/삭제 기능
+- [x] 여러 위젯을 컨테이너로 그룹화
+- [x] 부모-자식 관계 설정(parentId)
+- [x] 그룹 단위 이동
+- [x] 그룹 UI 단순화(헤더/박스 제거)
+- [x] 그룹 내 정렬/균등 분배 도구(아이콘 UI)
+- [ ] 그룹 단위 삭제/복사/붙여넣기
 
 ### 2. 레이아웃 저장/로드
 
-- [ ] 설계한 화면을 데이터베이스에 저장
+- [ ] 설계한 화면을 데이터베이스에 저장 (프론트 통합 진행 필요)
 - [ ] 저장된 화면 불러오기 기능
 - [ ] 버전 관리 시스템
 
 ### 3. 데이터 바인딩
 
-- [ ] 실제 데이터베이스와 연결
+- [ ] 실제 데이터베이스와 연결 (메타데이터 연동은 완료)
 - [ ] 폼 제출 및 데이터 저장
 - [ ] 유효성 검증 시스템
 
diff --git a/frontend/components/screen/GroupingToolbar.tsx b/frontend/components/screen/GroupingToolbar.tsx
index 24084853..642928a8 100644
--- a/frontend/components/screen/GroupingToolbar.tsx
+++ b/frontend/components/screen/GroupingToolbar.tsx
@@ -14,7 +14,19 @@ import {
   DialogTitle,
 } from "@/components/ui/dialog";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
-import { Group, Ungroup, Palette, Settings, X, Check } from "lucide-react";
+import {
+  Group,
+  Ungroup,
+  Palette,
+  Settings,
+  X,
+  Check,
+  AlignLeft,
+  AlignCenter,
+  AlignRight,
+  StretchHorizontal,
+  StretchVertical,
+} from "lucide-react";
 import { GroupState, ComponentData, ComponentStyle } from "@/types/screen";
 import { createGroupStyle } from "@/lib/utils/groupingUtils";
 
@@ -25,6 +37,8 @@ interface GroupingToolbarProps {
   onGroupUngroup: (groupId: string) => void;
   selectedComponents: ComponentData[];
   allComponents: ComponentData[];
+  onGroupAlign?: (mode: "left" | "centerX" | "right" | "top" | "centerY" | "bottom") => void;
+  onGroupDistribute?: (orientation: "horizontal" | "vertical") => void;
 }
 
 export const GroupingToolbar: React.FC<GroupingToolbarProps> = ({
@@ -34,6 +48,8 @@ export const GroupingToolbar: React.FC<GroupingToolbarProps> = ({
   onGroupUngroup,
   selectedComponents,
   allComponents,
+  onGroupAlign,
+  onGroupDistribute,
 }) => {
   const [showCreateDialog, setShowCreateDialog] = useState(false);
   const [groupTitle, setGroupTitle] = useState("새 그룹");
@@ -102,6 +118,9 @@ export const GroupingToolbar: React.FC<GroupingToolbarProps> = ({
         {selectedComponents.length > 0 && (
           <Badge variant="secondary" className="ml-2">
             {selectedComponents.length}개 선택됨
+            {selectedComponents.length > 1 && (
+              <span className="ml-1 text-xs opacity-75">(Shift+클릭으로 다중선택, 드래그로 함께 이동)</span>
+            )}
           </Badge>
         )}
 
@@ -147,6 +166,49 @@ export const GroupingToolbar: React.FC<GroupingToolbarProps> = ({
               <X className="h-3 w-3" />
             </Button>
           )}
+
+          {/* 정렬/분배 도구 */}
+          {selectedComponents.length > 1 && (
+            <div className="ml-2 flex items-center space-x-1">
+              <span className="mr-1 text-xs text-gray-500">정렬</span>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("left")} title="좌측 정렬">
+                <AlignLeft className="h-3 w-3" />
+              </Button>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("centerX")} title="가로 중앙 정렬">
+                <AlignCenter className="h-3 w-3" />
+              </Button>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("right")} title="우측 정렬">
+                <AlignRight className="h-3 w-3" />
+              </Button>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("top")} title="상단 정렬">
+                <AlignLeft className="h-3 w-3 rotate-90" />
+              </Button>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("centerY")} title="세로 중앙 정렬">
+                <AlignCenter className="h-3 w-3 rotate-90" />
+              </Button>
+              <Button variant="outline" size="sm" onClick={() => onGroupAlign?.("bottom")} title="하단 정렬">
+                <AlignRight className="h-3 w-3 rotate-90" />
+              </Button>
+              <div className="mx-1 h-4 w-px bg-gray-200" />
+              <span className="mr-1 text-xs text-gray-500">균등</span>
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={() => onGroupDistribute?.("horizontal")}
+                title="가로 균등 분배"
+              >
+                <StretchHorizontal className="h-3 w-3" />
+              </Button>
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={() => onGroupDistribute?.("vertical")}
+                title="세로 균등 분배"
+              >
+                <StretchVertical className="h-3 w-3" />
+              </Button>
+            </div>
+          )}
         </div>
       </div>
 
diff --git a/frontend/components/screen/RealtimePreview.tsx b/frontend/components/screen/RealtimePreview.tsx
index 4a839817..400de969 100644
--- a/frontend/components/screen/RealtimePreview.tsx
+++ b/frontend/components/screen/RealtimePreview.tsx
@@ -27,7 +27,7 @@ import {
 interface RealtimePreviewProps {
   component: ComponentData;
   isSelected?: boolean;
-  onClick?: () => void;
+  onClick?: (e?: React.MouseEvent) => void;
   onDragStart?: (e: React.DragEvent) => void;
   onDragEnd?: () => void;
   onGroupToggle?: (groupId: string) => void; // 그룹 접기/펼치기
@@ -36,16 +36,22 @@ interface RealtimePreviewProps {
 
 // 웹 타입에 따른 위젯 렌더링
 const renderWidget = (component: ComponentData) => {
-  const { widgetType, label, placeholder, required, readonly, columnName } = component;
+  const { widgetType, label, placeholder, required, readonly, columnName, style } = component;
 
   // 디버깅: 실제 widgetType 값 확인
   console.log("RealtimePreview - widgetType:", widgetType, "columnName:", columnName);
 
+  // 사용자가 테두리를 설정했는지 확인
+  const hasCustomBorder = style && (style.borderWidth || style.borderStyle || style.borderColor || style.border);
+
+  // 기본 테두리 제거 여부 결정 - Shadcn UI 기본 border 클래스를 덮어쓰기
+  const borderClass = hasCustomBorder ? "!border-0" : "";
+
   const commonProps = {
     placeholder: placeholder || `입력하세요...`,
     disabled: readonly,
     required: required,
-    className: "w-full h-full",
+    className: `w-full h-full ${borderClass}`,
   };
 
   switch (widgetType) {
@@ -68,7 +74,9 @@ const renderWidget = (component: ComponentData) => {
         <select
           disabled={readonly}
           required={required}
-          className="w-full rounded-md border border-gray-300 px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100"
+          className={`w-full rounded-md px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100 ${
+            hasCustomBorder ? "!border-0" : "border border-gray-300"
+          }`}
         >
           <option value="">{placeholder || "선택하세요..."}</option>
           <option value="option1">옵션 1</option>
@@ -130,7 +138,12 @@ const renderWidget = (component: ComponentData) => {
 
     case "code":
       return (
-        <Textarea {...commonProps} rows={4} className="w-full font-mono text-sm" placeholder="코드를 입력하세요..." />
+        <Textarea
+          {...commonProps}
+          rows={4}
+          className={`w-full font-mono text-sm ${borderClass}`}
+          placeholder="코드를 입력하세요..."
+        />
       );
 
     case "entity":
@@ -138,7 +151,9 @@ const renderWidget = (component: ComponentData) => {
         <select
           disabled={readonly}
           required={required}
-          className="w-full rounded-md border border-gray-300 px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100"
+          className={`w-full rounded-md px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100 ${
+            hasCustomBorder ? "!border-0" : "border border-gray-300"
+          }`}
         >
           <option value="">엔티티를 선택하세요...</option>
           <option value="user">사용자</option>
@@ -153,7 +168,9 @@ const renderWidget = (component: ComponentData) => {
           type="file"
           disabled={readonly}
           required={required}
-          className="w-full rounded-md border border-gray-300 px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100"
+          className={`w-full rounded-md px-3 py-2 text-sm focus:border-blue-500 focus:ring-2 focus:ring-blue-500 focus:outline-none disabled:cursor-not-allowed disabled:bg-gray-100 ${
+            hasCustomBorder ? "!border-0" : "border border-gray-300"
+          }`}
         />
       );
 
@@ -208,19 +225,39 @@ export const RealtimePreview: React.FC<RealtimePreviewProps> = ({
 }) => {
   const { type, label, tableName, columnName, widgetType, size, style } = component;
 
+  // 사용자가 테두리를 설정했는지 확인
+  const hasCustomBorder = style && (style.borderWidth || style.borderStyle || style.borderColor || style.border);
+
+  // 기본 선택 테두리는 사용자 테두리가 없을 때만 적용
+  const defaultRingClass = hasCustomBorder
+    ? ""
+    : isSelected
+      ? "ring-opacity-50 ring-2 ring-blue-500"
+      : "hover:ring-opacity-50 hover:ring-1 hover:ring-gray-300";
+
+  // 사용자 테두리가 있을 때 선택 상태 표시를 위한 스타일
+  const selectionStyle =
+    hasCustomBorder && isSelected
+      ? {
+          boxShadow: "0 0 0 2px rgba(59, 130, 246, 0.5)", // 외부 그림자로 선택 표시
+          ...style,
+        }
+      : style;
+
   return (
     <div
-      className={`absolute cursor-move transition-all ${
-        isSelected ? "ring-opacity-50 ring-2 ring-blue-500" : "hover:ring-opacity-50 hover:ring-1 hover:ring-gray-300"
-      }`}
+      className={`absolute cursor-move transition-all ${defaultRingClass}`}
       style={{
         left: `${component.position.x}px`,
         top: `${component.position.y}px`,
-        width: `${size.width * 80}px`,
+        width: `${size.width}px`, // 격자 기반 계산 제거
         height: `${size.height}px`,
-        ...style,
+        ...selectionStyle,
+      }}
+      onClick={(e) => {
+        e.stopPropagation();
+        onClick?.(e);
       }}
-      onClick={onClick}
       draggable
       onDragStart={onDragStart}
       onDragEnd={onDragEnd}
@@ -242,34 +279,9 @@ export const RealtimePreview: React.FC<RealtimePreviewProps> = ({
       )}
 
       {type === "group" && (
-        <div className="flex h-full flex-col rounded-lg border border-gray-200 bg-gray-50">
-          {/* 그룹 헤더 */}
-          <div
-            className="pointer-events-auto flex cursor-pointer items-center justify-between rounded-t-lg border-b bg-white px-2 py-1"
-            onClick={(e) => {
-              e.stopPropagation();
-              onGroupToggle?.(component.id);
-            }}
-          >
-            <div className="flex items-center space-x-1">
-              <Group className="h-3 w-3 text-blue-600" />
-              <span className="text-xs font-medium">{label || "그룹"}</span>
-              <span className="text-xs text-gray-500">({children ? children.length : 0}개)</span>
-            </div>
-            {component.collapsible &&
-              (component.collapsed ? (
-                <ChevronRight className="h-3 w-3 text-gray-500" />
-              ) : (
-                <ChevronDown className="h-3 w-3 text-gray-500" />
-              ))}
-          </div>
-
-          {/* 그룹 내용 */}
-          {!component.collapsed && (
-            <div className="pointer-events-none flex-1 space-y-1 overflow-auto p-1">
-              {children ? children : <div className="py-2 text-center text-xs text-gray-400">그룹이 비어있습니다</div>}
-            </div>
-          )}
+        <div className="relative h-full w-full">
+          {/* 그룹 박스/헤더 제거: 투명 컨테이너 */}
+          <div className="absolute inset-0">{children}</div>
         </div>
       )}
 
diff --git a/frontend/components/screen/ScreenDesigner.tsx b/frontend/components/screen/ScreenDesigner.tsx
index 1e17a203..2af7f679 100644
--- a/frontend/components/screen/ScreenDesigner.tsx
+++ b/frontend/components/screen/ScreenDesigner.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useCallback, useEffect, useMemo } from "react";
+import { useState, useCallback, useEffect, useMemo, useRef } from "react";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { Separator } from "@/components/ui/separator";
@@ -142,8 +142,12 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
   const [dragState, setDragState] = useState({
     isDragging: false,
     draggedComponent: null as ComponentData | null,
+    draggedComponents: [] as ComponentData[], // 다중선택된 컴포넌트들
     originalPosition: { x: 0, y: 0 },
     currentPosition: { x: 0, y: 0 },
+    isMultiDrag: false, // 다중 드래그 여부
+    initialMouse: { x: 0, y: 0 },
+    grabOffset: { x: 0, y: 0 },
   });
   const [groupState, setGroupState] = useState<GroupState>({
     isGrouping: false,
@@ -160,6 +164,132 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
   const [currentPage, setCurrentPage] = useState(1);
   const [itemsPerPage] = useState(10);
 
+  // 드래그 박스(마키) 다중선택 상태
+  const [selectionState, setSelectionState] = useState({
+    isSelecting: false,
+    start: { x: 0, y: 0 },
+    current: { x: 0, y: 0 },
+  });
+
+  // 선택된 컴포넌트를 항상 레이아웃 최신 값으로 참조 (좌표 실시간 반영용)
+  const selectedFromLayout = useMemo(() => {
+    if (!selectedComponent) return null;
+    return layout.components.find((c) => c.id === selectedComponent.id) || null;
+  }, [selectedComponent, layout.components]);
+
+  // 드래그 중에는 라이브 좌표를 계산하여 속성 패널에 표시
+  const liveSelectedPosition = useMemo(() => {
+    if (!selectedFromLayout) return { x: 0, y: 0 };
+
+    let x = selectedFromLayout.position.x;
+    let y = selectedFromLayout.position.y;
+
+    if (dragState.isDragging) {
+      const isSelectedInMulti = groupState.selectedComponents.includes(selectedFromLayout.id);
+      if (dragState.isMultiDrag && isSelectedInMulti) {
+        const deltaX = dragState.currentPosition.x - dragState.initialMouse.x;
+        const deltaY = dragState.currentPosition.y - dragState.initialMouse.y;
+        x = selectedFromLayout.position.x + deltaX;
+        y = selectedFromLayout.position.y + deltaY;
+      } else if (dragState.draggedComponent?.id === selectedFromLayout.id) {
+        x = dragState.currentPosition.x - dragState.grabOffset.x;
+        y = dragState.currentPosition.y - dragState.grabOffset.y;
+      }
+    }
+
+    return { x: Math.round(x), y: Math.round(y) };
+  }, [
+    selectedFromLayout,
+    dragState.isDragging,
+    dragState.isMultiDrag,
+    dragState.currentPosition.x,
+    dragState.currentPosition.y,
+    dragState.initialMouse.x,
+    dragState.initialMouse.y,
+    dragState.grabOffset.x,
+    dragState.grabOffset.y,
+    groupState.selectedComponents,
+  ]);
+
+  // 컴포넌트의 절대 좌표 계산 (그룹 자식은 부모 오프셋을 누적)
+  const getAbsolutePosition = useCallback(
+    (comp: ComponentData) => {
+      let x = comp.position.x;
+      let y = comp.position.y;
+      let cur: ComponentData | undefined = comp;
+      while (cur.parentId) {
+        const parent = layout.components.find((c) => c.id === cur!.parentId);
+        if (!parent) break;
+        x += parent.position.x;
+        y += parent.position.y;
+        cur = parent;
+      }
+      return { x, y };
+    },
+    [layout.components],
+  );
+
+  // 마키 선택 시작 (캔버스 빈 영역 마우스다운)
+  const handleMarqueeStart = useCallback(
+    (e: React.MouseEvent) => {
+      if (dragState.isDragging) return; // 드래그 중이면 무시
+      const rect = canvasRef.current?.getBoundingClientRect();
+      const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+      const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+      const x = rect ? e.clientX - rect.left + scrollLeft : 0;
+      const y = rect ? e.clientY - rect.top + scrollTop : 0;
+      setSelectionState({ isSelecting: true, start: { x, y }, current: { x, y } });
+      // 기존 선택 초기화 (Shift 미사용 시)
+      if (!e.shiftKey) {
+        setGroupState((prev) => ({ ...prev, selectedComponents: [] }));
+      }
+    },
+    [dragState.isDragging],
+  );
+
+  // 마키 이동
+  const handleMarqueeMove = useCallback(
+    (e: React.MouseEvent) => {
+      if (!selectionState.isSelecting) return;
+      const rect = canvasRef.current?.getBoundingClientRect();
+      const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+      const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+      const x = rect ? e.clientX - rect.left + scrollLeft : 0;
+      const y = rect ? e.clientY - rect.top + scrollTop : 0;
+      setSelectionState((prev) => ({ ...prev, current: { x, y } }));
+    },
+    [selectionState.isSelecting],
+  );
+
+  // 마키 종료 -> 영역 내 컴포넌트 선택
+  const handleMarqueeEnd = useCallback(() => {
+    if (!selectionState.isSelecting) return;
+    const minX = Math.min(selectionState.start.x, selectionState.current.x);
+    const minY = Math.min(selectionState.start.y, selectionState.current.y);
+    const maxX = Math.max(selectionState.start.x, selectionState.current.x);
+    const maxY = Math.max(selectionState.start.y, selectionState.current.y);
+
+    const selectedIds = layout.components
+      // 그룹 컨테이너는 제외
+      .filter((c) => c.type !== "group")
+      .filter((c) => {
+        const abs = getAbsolutePosition(c);
+        const left = abs.x;
+        const top = abs.y;
+        const right = abs.x + c.size.width;
+        const bottom = abs.y + c.size.height;
+        // 영역과 교차 여부 판단 (일부라도 겹치면 선택)
+        return right >= minX && left <= maxX && bottom >= minY && top <= maxY;
+      })
+      .map((c) => c.id);
+
+    setGroupState((prev) => ({
+      ...prev,
+      selectedComponents: Array.from(new Set([...prev.selectedComponents, ...selectedIds])),
+    }));
+    setSelectionState({ isSelecting: false, start: { x: 0, y: 0 }, current: { x: 0, y: 0 } });
+  }, [selectionState, layout.components, getAbsolutePosition]);
+
   // 테이블 데이터 로드 (실제로는 API에서 가져와야 함)
   useEffect(() => {
     const fetchTables = async () => {
@@ -519,8 +649,13 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
       };
       setLayout(newLayout);
       saveToHistory(newLayout);
+      // 선택된 컴포넌트인 경우 즉시 상태도 동기화하여 입력 즉시 반영되도록 처리
+      if (selectedComponent && selectedComponent.id === componentId) {
+        const updated = newLayout.components.find((c) => c.id === componentId) || null;
+        if (updated) setSelectedComponent(updated);
+      }
     },
-    [layout, saveToHistory],
+    [layout, saveToHistory, selectedComponent],
   );
 
   // 그룹 생성 함수
@@ -614,37 +749,100 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
     }
   }, [layout, selectedScreen]);
 
+  // 캔버스 참조 (좌표 계산 정확도 향상)
+  const canvasRef = useRef<HTMLDivElement | null>(null);
+  const scrollContainerRef = useRef<HTMLDivElement | null>(null);
+
   // 드래그 시작 (새 컴포넌트 추가)
   const startDrag = useCallback((component: Partial<ComponentData>, e: React.DragEvent) => {
+    const canvasRect = canvasRef.current?.getBoundingClientRect();
+    const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+    const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+    const relMouseX = (canvasRect ? e.clientX - canvasRect.left : 0) + scrollLeft;
+    const relMouseY = (canvasRect ? e.clientY - canvasRect.top : 0) + scrollTop;
+
     setDragState({
       isDragging: true,
       draggedComponent: component as ComponentData,
+      draggedComponents: [component as ComponentData],
       originalPosition: { x: 0, y: 0 },
-      currentPosition: { x: 0, y: 0 },
+      currentPosition: { x: relMouseX, y: relMouseY },
+      isMultiDrag: false,
+      initialMouse: { x: relMouseX, y: relMouseY },
+      grabOffset: { x: 0, y: 0 },
     });
     e.dataTransfer.setData("application/json", JSON.stringify(component));
   }, []);
 
   // 기존 컴포넌트 드래그 시작 (재배치)
-  const startComponentDrag = useCallback((component: ComponentData, e: React.DragEvent) => {
-    e.stopPropagation();
-    setDragState({
-      isDragging: true,
-      draggedComponent: component,
-      originalPosition: component.position,
-      currentPosition: component.position,
-    });
-    e.dataTransfer.setData("application/json", JSON.stringify({ ...component, isMoving: true }));
-  }, []);
+  const startComponentDrag = useCallback(
+    (component: ComponentData, e: React.DragEvent) => {
+      e.stopPropagation();
+
+      // 다중선택된 컴포넌트들이 있는지 확인
+      const selectedComponents = layout.components.filter((comp) => groupState.selectedComponents.includes(comp.id));
+
+      const isMultiDrag = selectedComponents.length > 1 && groupState.selectedComponents.includes(component.id);
+
+      // 마우스-컴포넌트 그랩 오프셋 계산 (커서와 컴포넌트 좌측상단의 거리)
+      const canvasRect = canvasRef.current?.getBoundingClientRect();
+      const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+      const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+      const relMouseX = (canvasRect ? e.clientX - canvasRect.left : 0) + scrollLeft;
+      const relMouseY = (canvasRect ? e.clientY - canvasRect.top : 0) + scrollTop;
+      const grabOffsetX = relMouseX - component.position.x;
+      const grabOffsetY = relMouseY - component.position.y;
+
+      if (isMultiDrag) {
+        // 다중 드래그
+        setDragState({
+          isDragging: true,
+          draggedComponent: component,
+          draggedComponents: selectedComponents,
+          originalPosition: component.position,
+          currentPosition: { x: relMouseX, y: relMouseY },
+          isMultiDrag: true,
+          initialMouse: { x: relMouseX, y: relMouseY },
+          grabOffset: { x: grabOffsetX, y: grabOffsetY },
+        });
+        e.dataTransfer.setData(
+          "application/json",
+          JSON.stringify({
+            ...component,
+            isMoving: true,
+            isMultiDrag: true,
+            selectedComponentIds: groupState.selectedComponents,
+          }),
+        );
+      } else {
+        // 단일 드래그
+        setDragState({
+          isDragging: true,
+          draggedComponent: component,
+          draggedComponents: [component],
+          originalPosition: component.position,
+          currentPosition: { x: relMouseX, y: relMouseY },
+          isMultiDrag: false,
+          initialMouse: { x: relMouseX, y: relMouseY },
+          grabOffset: { x: grabOffsetX, y: grabOffsetY },
+        });
+        e.dataTransfer.setData("application/json", JSON.stringify({ ...component, isMoving: true }));
+      }
+    },
+    [layout.components, groupState.selectedComponents],
+  );
 
   // 드래그 중
   const onDragOver = useCallback(
     (e: React.DragEvent) => {
       e.preventDefault();
       if (dragState.isDragging) {
-        const rect = e.currentTarget.getBoundingClientRect();
-        const x = Math.floor((e.clientX - rect.left) / 80) * 80;
-        const y = Math.floor((e.clientY - rect.top) / 60) * 60;
+        const rect = canvasRef.current?.getBoundingClientRect();
+        // 스크롤 오프셋 추가하여 컨텐츠 좌표로 변환 (상위 스크롤 컨테이너 기준)
+        const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+        const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+        const x = rect ? e.clientX - rect.left + scrollLeft : 0;
+        const y = rect ? e.clientY - rect.top + scrollTop : 0;
 
         setDragState((prev) => ({
           ...prev,
@@ -665,21 +863,59 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
 
         if (data.isMoving) {
           // 기존 컴포넌트 재배치
-          const rect = e.currentTarget.getBoundingClientRect();
-          const x = Math.floor((e.clientX - rect.left) / 80) * 80;
-          const y = Math.floor((e.clientY - rect.top) / 60) * 60;
+          const rect = canvasRef.current?.getBoundingClientRect();
+          // 스크롤 오프셋 추가하여 컨텐츠 좌표로 변환 (상위 스크롤 컨테이너 기준)
+          const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+          const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+          const mouseX = rect ? e.clientX - rect.left + scrollLeft : 0;
+          const mouseY = rect ? e.clientY - rect.top + scrollTop : 0;
 
-          const newLayout = {
-            ...layout,
-            components: layout.components.map((comp) => (comp.id === data.id ? { ...comp, position: { x, y } } : comp)),
-          };
-          setLayout(newLayout);
-          saveToHistory(newLayout);
+          if (data.isMultiDrag && data.selectedComponentIds) {
+            // 다중 드래그 처리
+            // 그랩한 컴포넌트의 시작 위치 기준 델타 계산 (그랩 오프셋 반영)
+            const dropX = mouseX - dragState.grabOffset.x;
+            const dropY = mouseY - dragState.grabOffset.y;
+            const deltaX = dropX - dragState.originalPosition.x;
+            const deltaY = dropY - dragState.originalPosition.y;
+
+            const newLayout = {
+              ...layout,
+              components: layout.components.map((comp) => {
+                if (data.selectedComponentIds.includes(comp.id)) {
+                  return {
+                    ...comp,
+                    position: {
+                      x: comp.position.x + deltaX,
+                      y: comp.position.y + deltaY,
+                    },
+                  };
+                }
+                return comp;
+              }),
+            };
+            setLayout(newLayout);
+            saveToHistory(newLayout);
+          } else {
+            // 단일 드래그 처리
+            const x = mouseX - dragState.grabOffset.x;
+            const y = mouseY - dragState.grabOffset.y;
+            const newLayout = {
+              ...layout,
+              components: layout.components.map((comp) =>
+                comp.id === data.id ? { ...comp, position: { x, y } } : comp,
+              ),
+            };
+            setLayout(newLayout);
+            saveToHistory(newLayout);
+          }
         } else {
           // 새 컴포넌트 추가
-          const rect = e.currentTarget.getBoundingClientRect();
-          const x = Math.floor((e.clientX - rect.left) / 80) * 80;
-          const y = Math.floor((e.clientY - rect.top) / 60) * 60;
+          const rect = canvasRef.current?.getBoundingClientRect();
+          // 스크롤 오프셋 추가하여 컨텐츠 좌표로 변환 (상위 스크롤 컨테이너 기준)
+          const scrollLeft = scrollContainerRef.current?.scrollLeft || 0;
+          const scrollTop = scrollContainerRef.current?.scrollTop || 0;
+          const x = rect ? e.clientX - rect.left + scrollLeft : 0;
+          const y = rect ? e.clientY - rect.top + scrollTop : 0;
 
           const newComponent: ComponentData = {
             ...data,
@@ -701,11 +937,22 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
       setDragState({
         isDragging: false,
         draggedComponent: null,
+        draggedComponents: [],
         originalPosition: { x: 0, y: 0 },
         currentPosition: { x: 0, y: 0 },
+        isMultiDrag: false,
+        initialMouse: { x: 0, y: 0 },
+        grabOffset: { x: 0, y: 0 },
       });
     },
-    [layout, saveToHistory],
+    [
+      layout,
+      saveToHistory,
+      dragState.initialMouse.x,
+      dragState.initialMouse.y,
+      dragState.grabOffset.x,
+      dragState.grabOffset.y,
+    ],
   );
 
   // 드래그 종료
@@ -713,16 +960,29 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
     setDragState({
       isDragging: false,
       draggedComponent: null,
+      draggedComponents: [],
       originalPosition: { x: 0, y: 0 },
       currentPosition: { x: 0, y: 0 },
+      isMultiDrag: false,
+      initialMouse: { x: 0, y: 0 },
+      grabOffset: { x: 0, y: 0 },
     });
   }, []);
 
   // 컴포넌트 클릭 (선택)
   const handleComponentClick = useCallback(
-    (component: ComponentData) => {
-      if (groupState.isGrouping) {
-        // 그룹화 모드에서는 다중 선택
+    (component: ComponentData, event?: React.MouseEvent) => {
+      const isShiftPressed = event?.shiftKey || false;
+
+      // 그룹 컨테이너는 다중선택 대상에서 제외
+      const isGroupContainer = component.type === "group";
+
+      if (groupState.isGrouping || isShiftPressed) {
+        // 그룹화 모드이거나 시프트 키를 누른 경우 다중 선택
+        if (isGroupContainer) {
+          // 그룹 컨테이너 클릭은 다중선택에 포함하지 않고 무시
+          return;
+        }
         const isSelected = groupState.selectedComponents.includes(component.id);
         setGroupState((prev) => ({
           ...prev,
@@ -730,16 +990,21 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
             ? prev.selectedComponents.filter((id) => id !== component.id)
             : [...prev.selectedComponents, component.id],
         }));
+
+        // 시프트 키로 선택한 경우 마지막 선택된 컴포넌트를 selectedComponent로 설정
+        if (isShiftPressed) {
+          setSelectedComponent(component);
+        }
       } else {
         // 일반 모드에서는 단일 선택
         setSelectedComponent(component);
         setGroupState((prev) => ({
           ...prev,
-          selectedComponents: [component.id],
+          selectedComponents: isGroupContainer ? [] : [component.id],
         }));
       }
     },
-    [groupState.isGrouping],
+    [groupState.isGrouping, groupState.selectedComponents],
   );
 
   // 화면이 선택되지 않았을 때 처리
@@ -773,7 +1038,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
             variant={groupState.isGrouping ? "default" : "outline"}
             size="sm"
             onClick={() => setGroupState((prev) => ({ ...prev, isGrouping: !prev.isGrouping }))}
-            title="그룹화 모드 토글"
+            title="그룹화 모드 토글 (일반 모드에서도 Shift+클릭으로 다중선택 가능)"
           >
             <Group className="mr-2 h-4 w-4" />
             {groupState.isGrouping ? "그룹화 모드" : "일반 모드"}
@@ -807,6 +1072,75 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
         onGroupUngroup={handleGroupUngroup}
         selectedComponents={layout.components.filter((comp) => groupState.selectedComponents.includes(comp.id))}
         allComponents={layout.components}
+        onGroupAlign={(mode) => {
+          const selected = layout.components.filter((c) => groupState.selectedComponents.includes(c.id));
+          if (selected.length < 2) return;
+
+          let newComponents = [...layout.components];
+          const minX = Math.min(...selected.map((c) => c.position.x));
+          const maxX = Math.max(...selected.map((c) => c.position.x + c.size.width));
+          const minY = Math.min(...selected.map((c) => c.position.y));
+          const maxY = Math.max(...selected.map((c) => c.position.y + c.size.height));
+          const centerX = (minX + maxX) / 2;
+          const centerY = (minY + maxY) / 2;
+
+          newComponents = newComponents.map((c) => {
+            if (!groupState.selectedComponents.includes(c.id)) return c;
+            if (mode === "left") return { ...c, position: { x: minX, y: c.position.y } };
+            if (mode === "right") return { ...c, position: { x: maxX - c.size.width, y: c.position.y } };
+            if (mode === "centerX")
+              return { ...c, position: { x: Math.round(centerX - c.size.width / 2), y: c.position.y } };
+            if (mode === "top") return { ...c, position: { x: c.position.x, y: minY } };
+            if (mode === "bottom") return { ...c, position: { x: c.position.x, y: maxY - c.size.height } };
+            if (mode === "centerY")
+              return { ...c, position: { x: c.position.x, y: Math.round(centerY - c.size.height / 2) } };
+            return c;
+          });
+
+          const newLayout = { ...layout, components: newComponents };
+          setLayout(newLayout);
+          saveToHistory(newLayout);
+        }}
+        onGroupDistribute={(orientation) => {
+          const selected = layout.components.filter((c) => groupState.selectedComponents.includes(c.id));
+          if (selected.length < 3) return; // 균등 분배는 3개 이상 권장
+
+          const sorted = [...selected].sort((a, b) =>
+            orientation === "horizontal" ? a.position.x - b.position.x : a.position.y - b.position.y,
+          );
+
+          if (orientation === "horizontal") {
+            const left = sorted[0].position.x;
+            const right = Math.max(...sorted.map((c) => c.position.x + c.size.width));
+            const totalWidth = right - left;
+            const gaps = sorted.length - 1;
+            const usedWidth = sorted.reduce((sum, c) => sum + c.size.width, 0);
+            const gapSize = gaps > 0 ? Math.max(0, Math.round((totalWidth - usedWidth) / gaps)) : 0;
+
+            let cursor = left;
+            sorted.forEach((c, idx) => {
+              c.position.x = cursor;
+              cursor += c.size.width + gapSize;
+            });
+          } else {
+            const top = sorted[0].position.y;
+            const bottom = Math.max(...sorted.map((c) => c.position.y + c.size.height));
+            const totalHeight = bottom - top;
+            const gaps = sorted.length - 1;
+            const usedHeight = sorted.reduce((sum, c) => sum + c.size.height, 0);
+            const gapSize = gaps > 0 ? Math.max(0, Math.round((totalHeight - usedHeight) / gaps)) : 0;
+
+            let cursor = top;
+            sorted.forEach((c, idx) => {
+              c.position.y = cursor;
+              cursor += c.size.height + gapSize;
+            });
+          }
+
+          const newLayout = { ...layout, components: [...layout.components] };
+          setLayout(newLayout);
+          saveToHistory(newLayout);
+        }}
       />
 
       {/* 메인 컨텐츠 영역 */}
@@ -850,7 +1184,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                         type: "container",
                         tableName: table.tableName,
                         label: table.tableLabel,
-                        size: { width: 12, height: 80 },
+                        size: { width: 200, height: 80 }, // 픽셀 단위로 변경
                       },
                       e,
                     )
@@ -896,7 +1230,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                               columnName: column.columnName,
                               widgetType: widgetType as WebType,
                               label: column.columnLabel || column.columnName,
-                              size: { width: 6, height: 40 },
+                              size: { width: 150, height: 40 }, // 픽셀 단위로 변경
                             },
                             e,
                           );
@@ -964,12 +1298,16 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
         </div>
 
         {/* 중앙: 캔버스 영역 */}
-        <div className="flex-1 bg-white">
+        <div className="flex-1 bg-white" ref={scrollContainerRef}>
           <div className="h-full w-full overflow-auto p-6">
             <div
               className="min-h-full rounded-lg border-2 border-dashed border-gray-300 bg-gray-50 p-4"
               onDrop={onDrop}
               onDragOver={onDragOver}
+              ref={canvasRef}
+              onMouseDown={handleMarqueeStart}
+              onMouseMove={handleMarqueeMove}
+              onMouseUp={handleMarqueeEnd}
             >
               {layout.components.length === 0 ? (
                 <div className="flex h-full items-center justify-center">
@@ -990,6 +1328,19 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                     </div>
                   </div>
 
+                  {/* 마키 선택 사각형 */}
+                  {selectionState.isSelecting && (
+                    <div
+                      className="pointer-events-none absolute z-50 border border-blue-400 bg-blue-200/20"
+                      style={{
+                        left: `${Math.min(selectionState.start.x, selectionState.current.x)}px`,
+                        top: `${Math.min(selectionState.start.y, selectionState.current.y)}px`,
+                        width: `${Math.abs(selectionState.current.x - selectionState.start.x)}px`,
+                        height: `${Math.abs(selectionState.current.y - selectionState.start.y)}px`,
+                      }}
+                    />
+                  )}
+
                   {/* 컴포넌트들 - 실시간 미리보기 */}
                   {layout.components
                     .filter((component) => !component.parentId) // 최상위 컴포넌트만 렌더링
@@ -1008,7 +1359,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                             selectedComponent?.id === component.id ||
                             groupState.selectedComponents.includes(component.id)
                           }
-                          onClick={() => handleComponentClick(component)}
+                          onClick={(e) => handleComponentClick(component, e)}
                           onDragStart={(e) => startComponentDrag(component, e)}
                           onDragEnd={endDrag}
                           onGroupToggle={(groupId) => {
@@ -1022,7 +1373,7 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                               key={child.id}
                               component={child}
                               isSelected={groupState.selectedComponents.includes(child.id)}
-                              onClick={() => handleComponentClick(child)}
+                              onClick={(e) => handleComponentClick(child, e)}
                               onDragStart={(e) => startComponentDrag(child, e)}
                               onDragEnd={endDrag}
                             />
@@ -1059,10 +1410,13 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                           id="positionX"
                           type="number"
                           min="0"
-                          value={selectedComponent.position.x}
-                          onChange={(e) =>
-                            updateComponentProperty(selectedComponent.id, "position.x", parseInt(e.target.value))
-                          }
+                          value={liveSelectedPosition.x}
+                          onChange={(e) => {
+                            const val = (e.target as HTMLInputElement).valueAsNumber;
+                            if (Number.isFinite(val)) {
+                              updateComponentProperty(selectedComponent.id, "position.x", Math.round(val));
+                            }
+                          }}
                         />
                       </div>
                       <div className="space-y-2">
@@ -1071,10 +1425,13 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                           id="positionY"
                           type="number"
                           min="0"
-                          value={selectedComponent.position.y}
-                          onChange={(e) =>
-                            updateComponentProperty(selectedComponent.id, "position.y", parseInt(e.target.value))
-                          }
+                          value={liveSelectedPosition.y}
+                          onChange={(e) => {
+                            const val = (e.target as HTMLInputElement).valueAsNumber;
+                            if (Number.isFinite(val)) {
+                              updateComponentProperty(selectedComponent.id, "position.y", Math.round(val));
+                            }
+                          }}
                         />
                       </div>
                     </div>
@@ -1086,12 +1443,18 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                         <Input
                           id="width"
                           type="number"
-                          min="1"
-                          max="12"
+                          min="20"
                           value={selectedComponent.size.width}
-                          onChange={(e) =>
-                            updateComponentProperty(selectedComponent.id, "size.width", parseInt(e.target.value))
-                          }
+                          onChange={(e) => {
+                            const val = (e.target as HTMLInputElement).valueAsNumber;
+                            if (Number.isFinite(val)) {
+                              updateComponentProperty(
+                                selectedComponent.id,
+                                "size.width",
+                                Math.max(20, Math.round(val)),
+                              );
+                            }
+                          }}
                         />
                       </div>
                       <div className="space-y-2">
@@ -1101,9 +1464,16 @@ export default function ScreenDesigner({ selectedScreen, onBackToList }: ScreenD
                           type="number"
                           min="20"
                           value={selectedComponent.size.height}
-                          onChange={(e) =>
-                            updateComponentProperty(selectedComponent.id, "size.height", parseInt(e.target.value))
-                          }
+                          onChange={(e) => {
+                            const val = (e.target as HTMLInputElement).valueAsNumber;
+                            if (Number.isFinite(val)) {
+                              updateComponentProperty(
+                                selectedComponent.id,
+                                "size.height",
+                                Math.max(20, Math.round(val)),
+                              );
+                            }
+                          }}
                         />
                       </div>
                     </div>
diff --git a/frontend/components/screen/StyleEditor.tsx b/frontend/components/screen/StyleEditor.tsx
index 991a7932..749c51d5 100644
--- a/frontend/components/screen/StyleEditor.tsx
+++ b/frontend/components/screen/StyleEditor.tsx
@@ -88,29 +88,7 @@ export default function StyleEditor({ style, onStyleChange, className }: StyleEd
 
             {/* 레이아웃 탭 */}
             <TabsContent value="layout" className="space-y-4">
-              <div className="grid grid-cols-2 gap-4">
-                <div className="space-y-2">
-                  <Label htmlFor="width">너비</Label>
-                  <Input
-                    id="width"
-                    type="text"
-                    placeholder="100px, 50%, auto"
-                    value={localStyle.width || ""}
-                    onChange={(e) => handleStyleChange("width", e.target.value)}
-                  />
-                </div>
-                <div className="space-y-2">
-                  <Label htmlFor="height">높이</Label>
-                  <Input
-                    id="height"
-                    type="text"
-                    placeholder="100px, 50%, auto"
-                    value={localStyle.height || ""}
-                    onChange={(e) => handleStyleChange("height", e.target.value)}
-                  />
-                </div>
-              </div>
-
+              {/* 너비/높이는 위젯 속성에서만 관리하도록 제거 */}
               <div className="grid grid-cols-2 gap-4">
                 <div className="space-y-2">
                   <Label htmlFor="display">표시 방식</Label>
diff --git a/frontend/lib/utils/groupingUtils.ts b/frontend/lib/utils/groupingUtils.ts
index 16108fae..adb62c3d 100644
--- a/frontend/lib/utils/groupingUtils.ts
+++ b/frontend/lib/utils/groupingUtils.ts
@@ -15,15 +15,15 @@ export function createGroupComponent(
   boundingBox?: { width: number; height: number },
   style?: any,
 ): GroupComponent {
-  // 격자 기반 크기 계산
-  const gridWidth = Math.max(6, Math.ceil(boundingBox?.width / 80) + 2); // 최소 6 그리드, 여백 2
-  const gridHeight = Math.max(100, (boundingBox?.height || 200) + 40); // 최소 100px, 여백 40px
+  // 픽셀 기반 크기 계산 (격자 제거)
+  const groupWidth = Math.max(200, (boundingBox?.width || 200) + 40); // 최소 200px, 여백 40px
+  const groupHeight = Math.max(100, (boundingBox?.height || 200) + 40); // 최소 100px, 여백 40px
 
   return {
     id: generateComponentId(),
     type: "group",
     position,
-    size: { width: gridWidth, height: gridHeight },
+    size: { width: groupWidth, height: groupHeight },
     label: title, // title 대신 label 사용
     backgroundColor: "#f8f9fa",
     border: "1px solid #dee2e6",
@@ -39,7 +39,7 @@ export function createGroupComponent(
   };
 }
 
-// 선택된 컴포넌트들의 경계 박스 계산 (격자 기반)
+// 선택된 컴포넌트들의 경계 박스 계산 (픽셀 기반)
 export function calculateBoundingBox(components: ComponentData[]): {
   minX: number;
   minY: number;
@@ -54,7 +54,7 @@ export function calculateBoundingBox(components: ComponentData[]): {
 
   const minX = Math.min(...components.map((c) => c.position.x));
   const minY = Math.min(...components.map((c) => c.position.y));
-  const maxX = Math.max(...components.map((c) => c.position.x + c.size.width * 80));
+  const maxX = Math.max(...components.map((c) => c.position.x + c.size.width)); // 격자 계산 제거
   const maxY = Math.max(...components.map((c) => c.position.y + c.size.height));
 
   return {