diff --git a/B07_DesignDetail/B07_DesignDetail_Api_Fetch.ts b/B07_DesignDetail/B07_DesignDetail_Api_Fetch.ts
index 9fe1618e..07c20a22 100644
--- a/B07_DesignDetail/B07_DesignDetail_Api_Fetch.ts
+++ b/B07_DesignDetail/B07_DesignDetail_Api_Fetch.ts
@@ -43,7 +43,12 @@ export type QuantityTable = Record<string, number | null>;
 /** 측구 형식별 규격 (B06 엔진 ditch_spec 신구조와 1:1). */
 export type DitchSpec =
   | { type: "none" }
-  | { type: "standard"; top_width_m: number; bottom_width_m: number; depth_m: number }
+  | {
+      type: "standard";
+      top_width_m: number;
+      bottom_width_m: number;
+      depth_m: number;
+    }
   | { type: "l_type"; width_m: number; depth_m: number };
 
 /** B06에서 지정한 설계(지반정보·계획정보). 횡단도에만 존재. status로 잠정/확정 구분. */
@@ -61,7 +66,10 @@ export interface CrossDesignInfo {
   cross_slope_pct?: number;
   paved?: boolean;
   ditch: DitchSpec;
-  road_edges?: Record<"left" | "right", { offset_m: number; elevation_m: number }>;
+  road_edges?: Record<
+    "left" | "right",
+    { offset_m: number; elevation_m: number }
+  >;
   design_elevation_m: number;
   cut_area_m2: number;
   fill_area_m2: number;
@@ -90,7 +98,10 @@ export interface DesignDrawingConfirmResponse {
   design?: CrossDesignInfo | null;
 }
 
-async function requestJson<T>(path: string, init: RequestInit = {}): Promise<T> {
+async function requestJson<T>(
+  path: string,
+  init: RequestInit = {},
+): Promise<T> {
   const controller = new AbortController();
   const timeoutId = window.setTimeout(() => controller.abort(), API_TIMEOUT_MS);
   try {
@@ -101,14 +112,17 @@ async function requestJson<T>(path: string, init: RequestInit = {}): Promise<T>
       signal: controller.signal,
     });
     const payload = (await response.json()) as T & { message?: string };
-    if (!response.ok) throw new Error(payload.message ?? `HTTP ${response.status}`);
+    if (!response.ok)
+      throw new Error(payload.message ?? `HTTP ${response.status}`);
     return payload;
   } finally {
     window.clearTimeout(timeoutId);
   }
 }
 
-export function fetchDesignDrawingList(projectId: string): Promise<DesignDrawingListResponse> {
+export function fetchDesignDrawingList(
+  projectId: string,
+): Promise<DesignDrawingListResponse> {
   return requestJson(`/projects/${projectId}/design-drawings`);
 }
 
@@ -116,7 +130,9 @@ export function fetchDesignDrawing(
   projectId: string,
   drawingId: string,
 ): Promise<DesignDrawingResponse> {
-  return requestJson(`/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}`);
+  return requestJson(
+    `/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}`,
+  );
 }
 
 export function confirmDesignDrawing(
@@ -127,13 +143,44 @@ export function confirmDesignDrawing(
 ): Promise<DesignDrawingConfirmResponse> {
   return requestJson(
     `/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}/confirm`,
-    { method: "PUT", body: JSON.stringify({ drawing, quantity_table: quantityTable ?? null }) },
+    {
+      method: "PUT",
+      body: JSON.stringify({ drawing, quantity_table: quantityTable ?? null }),
+    },
   );
 }
 
-export function invalidateDesignDrawing(projectId: string, drawingId: string): Promise<void> {
+export function invalidateDesignDrawing(
+  projectId: string,
+  drawingId: string,
+): Promise<void> {
   return requestJson(
     `/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}/invalidate`,
     { method: "POST" },
   );
 }
+
+/** 도각 편집 화면이 싣는 도각 한 장 (실치수 1:1, 잠금 없는 도면층). */
+export interface FrameTemplateResponse {
+  status: string;
+  project_id: string;
+  drawing: CadDrawing;
+  /** 회사가 고친 도각을 쓰고 있으면 true, 프로그램 기본 도각이면 false. */
+  customized: boolean;
+}
+
+export function fetchFrameTemplate(
+  projectId: string,
+): Promise<FrameTemplateResponse> {
+  return requestJson(`/projects/${projectId}/frame-template`);
+}
+
+export function saveFrameTemplate(
+  projectId: string,
+  drawing: CadDrawing,
+): Promise<void> {
+  return requestJson(`/projects/${projectId}/frame-template`, {
+    method: "PUT",
+    body: JSON.stringify({ drawing }),
+  });
+}
diff --git a/B07_DesignDetail/B07_DesignDetail_Engine_Template.py b/B07_DesignDetail/B07_DesignDetail_Engine_Template.py
index 402d5b8a..63bb956e 100644
--- a/B07_DesignDetail/B07_DesignDetail_Engine_Template.py
+++ b/B07_DesignDetail/B07_DesignDetail_Engine_Template.py
@@ -12,6 +12,7 @@ A1 템플릿 기하(변환 시점 고정값): 전체 840x594, 하단 y17~47 표
 import json
 import logging
 import re
+from contextvars import ContextVar
 from functools import lru_cache
 from pathlib import Path
 from typing import Any
@@ -19,6 +20,7 @@ from uuid import uuid5
 
 from B07_DesignDetail.B07_DesignDetail_Engine_Cad import (
     _ENTITY_NS,
+    DRAWING_FORMAT,
     FRAME_LAYER_ID,
 )
 
@@ -34,13 +36,81 @@ _A1_INNER = (42.0, 47.0, 812.0, 567.0)
 # 비워 횡단 장이 한 장 더 늘었다 — 2%로 줄여 작도 영역을 쓴다(2026-08-30 사용자).
 _CONTENT_MARGIN = 0.02
 
+# 회사가 자기 도각을 두는 자리 — `storage/{회사}/templates/`. 프로그램 기본 도각
+# (`resources/template_2dDrawing/`)은 **읽기 전용**이고, 고객이 고친 도각은 여기 쌓인다
+# (2026-09-01 사용자 확정: "정본은 그냥 두고 수정하는 기능").
+COMPANY_TEMPLATE_SUBDIR = "templates"
+
+# 이 요청이 읽을 회사 도각 폴더. 라우터가 요청마다 세운다 — 엔진 6개(종단·횡단장·
+# 토적도·유역도·표지·공용)의 서명을 줄줄이 고치지 않으려고 문맥 변수를 쓴다.
+# `asyncio.to_thread`가 문맥을 복사하므로 스레드로 넘어간 작도에도 그대로 따라간다.
+_company_dir: ContextVar[Path | None] = ContextVar("b07_company_template_dir", default=None)
+
+
+def use_company_templates(company_dir: Path | None) -> None:
+    """이 요청이 읽을 회사 도각 폴더를 정한다. None이면 프로그램 기본 도각."""
+    _company_dir.set(company_dir)
+
+
+def company_template_path(company_dir: Path, name: str = A1_TEMPLATE) -> Path:
+    """회사 도각 파일 경로(없을 수도 있다)."""
+    return Path(company_dir) / COMPANY_TEMPLATE_SUBDIR / f"{name}.json"
+
+
+@lru_cache(maxsize=16)
+def _read_template(path_str: str, mtime_ns: int) -> dict[str, Any]:
+    """파일 하나를 읽어 캐시한다. 수정 시각이 캐시 키라 저장 즉시 새 도각이 나간다."""
+    return json.loads(Path(path_str).read_text(encoding="utf-8"))
+
 
-@lru_cache(maxsize=8)
 def _load_template(name: str) -> dict[str, Any] | None:
+    """회사 도각이 있으면 그것, 없으면 프로그램 기본 도각."""
+    company_dir = _company_dir.get()
+    if company_dir is not None:
+        override = company_template_path(company_dir, name)
+        if override.is_file():
+            return _read_template(str(override), override.stat().st_mtime_ns)
     path = _TEMPLATE_DIR / f"{name}.json"
-    if not path.exists():
+    if not path.is_file():
         return None
-    return json.loads(path.read_text(encoding="utf-8"))
+    return _read_template(str(path), path.stat().st_mtime_ns)
+
+
+def template_entities(name: str = A1_TEMPLATE) -> list[dict[str, Any]]:
+    """도각 원본 엔티티(실치수 1:1). 편집 화면이 그대로 싣고, 저장도 이 좌표계로 받는다."""
+    template = _load_template(name)
+    return list(template.get("entities", [])) if template else []
+
+
+def frame_template_document(name: str = A1_TEMPLATE) -> dict[str, Any]:
+    """도각 편집 화면이 그대로 싣는 도면 — 실치수 1:1, 잠금 없는 도각 층 하나.
+
+    1:1이라 편집 캔버스 좌표가 곧 템플릿 좌표다. 저장할 때 되돌릴 변환이 없다.
+    """
+    return {
+        "format": DRAWING_FORMAT,
+        "entities": [{**entity, "layerId": FRAME_LAYER_ID} for entity in template_entities(name)],
+        "layers": [{"id": FRAME_LAYER_ID, "name": "도각", "isVisible": True, "isLocked": False}],
+    }
+
+
+def save_company_template(
+    company_dir: Path, entities: list[dict[str, Any]], name: str = A1_TEMPLATE
+) -> Path:
+    """편집한 도각을 회사 도각 파일로 저장한다. 프로그램 기본 도각은 건드리지 않는다."""
+    path = company_template_path(company_dir, name)
+    path.parent.mkdir(parents=True, exist_ok=True)
+    document = {
+        "format": DRAWING_FORMAT,
+        "source": "B07 도각 편집 화면",
+        # 도각은 도면마다 잠금 층 하나로 붙으므로 편집 중 새로 만든 층은 도각으로 모은다.
+        "entities": [{**entity, "layerId": FRAME_LAYER_ID} for entity in entities],
+        "layers": [{"id": FRAME_LAYER_ID, "name": "도각", "isVisible": True, "isLocked": False}],
+    }
+    temporary = path.with_suffix(".tmp")
+    temporary.write_text(json.dumps(document, ensure_ascii=False, indent=2), encoding="utf-8")
+    temporary.replace(path)
+    return path
 
 
 def entities_bbox(entities: list[dict[str, Any]]) -> tuple[float, float, float, float] | None:
diff --git a/B07_DesignDetail/B07_DesignDetail_Router.py b/B07_DesignDetail/B07_DesignDetail_Router.py
index 3a01ed65..1012abeb 100644
--- a/B07_DesignDetail/B07_DesignDetail_Router.py
+++ b/B07_DesignDetail/B07_DesignDetail_Router.py
@@ -24,6 +24,12 @@ from B07_DesignDetail.B07_DesignDetail_Engine_Cad_Sheet import (
 from B07_DesignDetail.B07_DesignDetail_Engine_Cad_Table import (
     extract_quantity_table,
 )
+from B07_DesignDetail.B07_DesignDetail_Engine_Template import (
+    company_template_path,
+    frame_template_document,
+    save_company_template,
+    use_company_templates,
+)
 from B07_DesignDetail.B07_DesignDetail_Router_Support import (
     MASS_HAUL_ID,
     WATERSHED_ID,
@@ -41,6 +47,9 @@ from B07_DesignDetail.B07_DesignDetail_Schema import (
     DesignDrawingInvalidateResponse,
     DesignDrawingListResponse,
     DesignDrawingResponse,
+    FrameTemplateResponse,
+    FrameTemplateSaveRequest,
+    FrameTemplateSaveResponse,
 )
 from common_util.common_util_drainage_context import load_drainage_context
 from common_util.common_util_storage import resolve_stored_project_path
@@ -74,6 +83,18 @@ async def _confirmed_source(project_id: UUID) -> tuple[int, Path, Path]:
     return route_id, root, longitudinal_path
 
 
+async def _company_dir(project_id: UUID) -> Path:
+    """프로젝트 저장 경로에서 회사 폴더를 얻는다 — `storage/{회사}/{사용자}/{프로젝트}`.
+
+    회사 도각은 회사 폴더에 산다(로고·서명과 같은 결). DB를 한 번 더 뒤지지 않는다.
+    """
+    pool = get_db_pool()
+    async with pool.acquire() as connection:
+        stored_path = await get_project_storage_relative_path(connection, project_id)
+    root = Path(resolve_stored_project_path(stored_path)).resolve()
+    return root.parent.parent
+
+
 async def _designs_by_chainage(route_id: int) -> dict[int, dict[str, Any]]:
     """노선 전체의 측점별 설계 지정 {측점(m): design}. 장 배치·목록이 함께 쓴다."""
     pool = get_db_pool()
@@ -117,6 +138,9 @@ async def get_design_drawing(
     """선택한 도면 원본 한 건만 읽어 CAD 스키마로 변환한다."""
     try:
         route_id, project_root, longitudinal_path = await _confirmed_source(project_id)
+        # 이 회사가 고친 도각이 있으면 그것으로 그린다(없으면 프로그램 기본 도각).
+        # 저장 경로는 `storage/{회사}/{사용자}/{프로젝트}` 이므로 두 단계 위가 회사 폴더다.
+        use_company_templates(project_root.parent.parent)
         # 횡단도는 B06 지정 설계를 먼저 읽어 CAD 계획선(design_line)과 응답에 함께 쓴다.
         design: dict[str, Any] | None = None
         source_design: Any = None
@@ -355,3 +379,50 @@ async def invalidate_design_drawing(
             status_code=500,
             content={"status": "error", "message": "상세 설계 도면 상태를 되돌리지 못했습니다."},
         )
+
+
+@router.get("/{project_id}/frame-template", response_model=FrameTemplateResponse)
+async def get_frame_template(project_id: UUID) -> FrameTemplateResponse | JSONResponse:
+    """도각 편집 화면이 실을 도각 한 장. 회사 도각이 있으면 그것, 없으면 프로그램 기본."""
+    try:
+        company_dir = await _company_dir(project_id)
+        use_company_templates(company_dir)
+        return FrameTemplateResponse(
+            project_id=str(project_id),
+            drawing=frame_template_document(),
+            customized=company_template_path(company_dir).is_file(),
+        )
+    except FileNotFoundError as exc:
+        return JSONResponse(status_code=404, content={"status": "error", "message": str(exc)})
+    except Exception:
+        logger.exception("B07 도각 조회 실패: project_id=%s", project_id)
+        return JSONResponse(
+            status_code=500,
+            content={"status": "error", "message": "도각을 읽지 못했습니다."},
+        )
+
+
+@router.put("/{project_id}/frame-template", response_model=FrameTemplateSaveResponse)
+async def put_frame_template(
+    project_id: UUID, request: FrameTemplateSaveRequest
+) -> FrameTemplateSaveResponse | JSONResponse:
+    """편집한 도각을 회사 도각으로 저장한다. 프로그램 기본 도각은 그대로 둔다.
+
+    이미 확정한 도면은 저장본을 그대로 쓰므로 옛 도각을 유지한다 — 확정을 풀면
+    다음에 열 때 새 도각으로 다시 그려진다(2026-09-01 사용자 확정).
+    """
+    try:
+        entities = request.drawing.get("entities")
+        if not isinstance(entities, list):
+            raise ValueError("도각 엔티티가 없습니다.")
+        company_dir = await _company_dir(project_id)
+        await asyncio.to_thread(save_company_template, company_dir, entities)
+        return FrameTemplateSaveResponse(project_id=str(project_id))
+    except (FileNotFoundError, ValueError) as exc:
+        return JSONResponse(status_code=400, content={"status": "error", "message": str(exc)})
+    except Exception:
+        logger.exception("B07 도각 저장 실패: project_id=%s", project_id)
+        return JSONResponse(
+            status_code=500,
+            content={"status": "error", "message": "도각을 저장하지 못했습니다."},
+        )
diff --git a/B07_DesignDetail/B07_DesignDetail_Schema.py b/B07_DesignDetail/B07_DesignDetail_Schema.py
index 12f54d6f..9c6b305d 100644
--- a/B07_DesignDetail/B07_DesignDetail_Schema.py
+++ b/B07_DesignDetail/B07_DesignDetail_Schema.py
@@ -68,3 +68,27 @@ class DesignDrawingInvalidateResponse(BaseModel):
     project_id: str
     id: str
     confirmed: bool = False
+
+
+class FrameTemplateResponse(BaseModel):
+    """도각 편집 화면이 실을 도각 한 장(실치수 1:1, 잠금 없는 도면층)."""
+
+    status: str = "success"
+    project_id: str
+    drawing: dict[str, Any]
+    # 회사가 고친 도각을 쓰고 있으면 True, 프로그램 기본 도각이면 False.
+    customized: bool = False
+
+
+class FrameTemplateSaveRequest(BaseModel):
+    """도각 편집 화면이 [완료]에서 넘기는 도각."""
+
+    drawing: dict[str, Any]
+
+
+class FrameTemplateSaveResponse(BaseModel):
+    """회사 도각 저장 결과."""
+
+    status: str = "success"
+    project_id: str
+    customized: bool = True
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_FrameEdit.ts b/B07_DesignDetail/B07_DesignDetail_UI_FrameEdit.ts
new file mode 100644
index 00000000..1f51c304
--- /dev/null
+++ b/B07_DesignDetail/B07_DesignDetail_UI_FrameEdit.ts
@@ -0,0 +1,117 @@
+/**
+ * B07 도각 편집 모드 — 캐드 화면에서 도각(양식)만 따로 열어 고치고 [완료]로 한 번에 반영한다.
+ *
+ * 정본(`resources/template_2dDrawing/00_template_A1.json`)은 프로그램 기본 도각이라
+ * 건드리지 않는다. 고친 도각은 **회사 도각**(`storage/{회사}/templates/`)으로 저장되고,
+ * 이후 그리는 도면이 그것을 쓴다 (2026-09-01 사용자 확정).
+ *
+ * 이미 확정한 도면은 저장본을 그대로 쓰므로 옛 도각을 유지한다 — 확정을 풀면 다시 그려진다.
+ */
+
+import { createButton, showToast } from "@ui/ui_template_elements";
+import {
+  type CadDrawing,
+  fetchFrameTemplate,
+  saveFrameTemplate,
+} from "./B07_DesignDetail_Api_Fetch";
+
+export interface FrameTemplateEditor {
+  /** 도면 목록 아래에 놓는 「도각 편집」 버튼. */
+  button: HTMLButtonElement;
+  /** 편집 중임을 알리는 CAD 화면 상단 띠 (평소엔 숨김). */
+  banner: HTMLElement;
+  /** 편집 중인가 — 도면 변경 알림(확정 해제)을 이 동안 막는 데 쓴다. */
+  isEditing: () => boolean;
+}
+
+interface Options {
+  projectId: string;
+  /** CAD에 도면을 싣는다 (meta null이면 수량 패널을 숨긴다). */
+  sendLoad: (drawing: CadDrawing, meta: null) => void;
+  /** CAD에서 현재 편집본을 받아온다. */
+  requestCadDrawing: () => Promise<CadDrawing>;
+  /** 편집을 마친 뒤 보던 도면으로 돌아간다. */
+  restoreDrawing: () => void;
+  /** 도각이 바뀌었으니 받아 둔 도면 캐시를 버린다 — 안 버리면 옛 도각이 그대로 보인다. */
+  onSaved: () => void;
+}
+
+export function createFrameTemplateEditor(
+  options: Options,
+): FrameTemplateEditor {
+  let editing = false;
+
+  const banner = document.createElement("div");
+  banner.className = "b07-frame-edit";
+  banner.hidden = true;
+  const label = document.createElement("span");
+  label.className = "b07-frame-edit__label";
+  banner.append(label);
+
+  const finishButton = createButton({
+    label: "완료",
+    variant: "filled",
+    onClick: () => void finish(),
+  });
+  const cancelButton = createButton({
+    label: "취소",
+    variant: "ghost",
+    onClick: () => leave(),
+  });
+  banner.append(finishButton, cancelButton);
+
+  const button = createButton({
+    label: "도각 편집",
+    variant: "ghost",
+    onClick: () => void enter(),
+  });
+
+  const leave = (): void => {
+    editing = false;
+    banner.hidden = true;
+    button.disabled = false;
+    options.restoreDrawing();
+  };
+
+  async function enter(): Promise<void> {
+    try {
+      const response = await fetchFrameTemplate(options.projectId);
+      editing = true;
+      button.disabled = true;
+      banner.hidden = false;
+      label.textContent = response.customized
+        ? "도각 편집 중 — 회사 도각을 고치고 있습니다."
+        : "도각 편집 중 — 기본 도각을 고치면 회사 도각으로 저장됩니다.";
+      options.sendLoad(response.drawing, null);
+    } catch (error) {
+      showToast(
+        error instanceof Error ? error.message : "도각을 불러오지 못했습니다.",
+        "error",
+      );
+    }
+  }
+
+  async function finish(): Promise<void> {
+    if (!editing) return;
+    finishButton.disabled = true;
+    try {
+      const drawing = await options.requestCadDrawing();
+      await saveFrameTemplate(options.projectId, drawing);
+      options.onSaved();
+      showToast(
+        "도각을 저장했습니다. 확정하지 않은 도면부터 새 도각으로 나옵니다.",
+        "success",
+      );
+      leave();
+    } catch (error) {
+      showToast(
+        error instanceof Error ? error.message : "도각을 저장하지 못했습니다.",
+        "error",
+      );
+    } finally {
+      finishButton.disabled = false;
+    }
+  }
+
+  return { button, banner, isEditing: () => editing };
+}
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Page.ts b/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
index dd332348..b78ae815 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
@@ -40,6 +40,7 @@ import {
   type QuantityTable,
 } from "./B07_DesignDetail_Api_Fetch";
 import { appendStructureEntities } from "./B07_DesignDetail_UI_Cad_Structures";
+import { createFrameTemplateEditor } from "./B07_DesignDetail_UI_FrameEdit";
 
 /** CAD 앱 수량 패널로 넘기는 설계 컨텍스트 (openwebcad DesignMeta와 동일 형식). */
 interface DesignMeta {
@@ -80,7 +81,10 @@ const CAD_TOAST_MESSAGE = "aislo:b08:toast";
 const CAD_TOAST_ACTION_MESSAGE = "aislo:b08:toast-action";
 
 /** 도면 구성 12분류 (2026-08-29 사용자 확정 순서). kind가 없으면 아직 만들지 않는 도면. */
-const DRAWING_GROUPS: readonly { label: string; kind?: DesignDrawingItem["kind"] }[] = [
+const DRAWING_GROUPS: readonly {
+  label: string;
+  kind?: DesignDrawingItem["kind"];
+}[] = [
   { label: "표지", kind: "cover" },
   { label: "계획평면도(지형)" },
   { label: "계획평면도(노선배치도)" },
@@ -120,7 +124,10 @@ function buildDrawingSidePanel(
     return panel;
   }
 
-  const drawingButton = (drawing: DesignDrawingItem, label: string): HTMLButtonElement => {
+  const drawingButton = (
+    drawing: DesignDrawingItem,
+    label: string,
+  ): HTMLButtonElement => {
     const button = document.createElement("button");
     button.type = "button";
     button.className = "b07-drawing-button";
@@ -135,7 +142,9 @@ function buildDrawingSidePanel(
   };
 
   for (const group of DRAWING_GROUPS) {
-    const items = group.kind ? drawings.filter((item) => item.kind === group.kind) : [];
+    const items = group.kind
+      ? drawings.filter((item) => item.kind === group.kind)
+      : [];
     // 한 장짜리(와 아직 없는 도면)는 컨테이너 없이 버튼 하나로 둔다.
     if (items.length <= 1) {
       const [drawing] = items;
@@ -174,7 +183,10 @@ function buildDrawingSidePanel(
   return panel;
 }
 
-const GROUND_TYPE_LABEL: Record<CrossDesignInfo["ground_type"], keyof typeof ui_locales> = {
+const GROUND_TYPE_LABEL: Record<
+  CrossDesignInfo["ground_type"],
+  keyof typeof ui_locales
+> = {
   soil: "B06_Design_Ground_Soil",
   ripping_rock: "B06_Design_Ground_Ripping",
   blasting_rock: "B06_Design_Ground_Blasting",
@@ -191,7 +203,8 @@ function cutSideLabel(mode: CrossDesignInfo["section_mode"]): string {
 /** 측구 규격 표시 문자열 (design 신구조: 형식별 ditch spec, F-2 호환). */
 function ditchLabel(design: CrossDesignInfo): string {
   const ditch = design.ditch;
-  if (!ditch || ditch.type === "none" || design.ditch_enabled === false) return "없음";
+  if (!ditch || ditch.type === "none" || design.ditch_enabled === false)
+    return "없음";
   if (ditch.type === "l_type")
     return `L형 ${ditch.width_m.toFixed(2)}×${ditch.depth_m.toFixed(2)}m`;
   return `${ditch.top_width_m.toFixed(2)}×${ditch.depth_m.toFixed(2)}m`;
@@ -211,7 +224,10 @@ function infoRow(label: string, value: string): HTMLElement {
 }
 
 /** 선택 횡단도의 지반정보/계획정보를 2분할로 렌더한다 (잠정치, B07 확정 시 재계산). */
-function buildDesignInfoPanel(title: string, design: CrossDesignInfo | null): HTMLElement {
+function buildDesignInfoPanel(
+  title: string,
+  design: CrossDesignInfo | null,
+): HTMLElement {
   const panel = document.createElement("div");
   panel.className = "b07-info";
   const heading = document.createElement("div");
@@ -221,7 +237,9 @@ function buildDesignInfoPanel(title: string, design: CrossDesignInfo | null): HT
   const confirmed = design?.status === "confirmed";
   const badge = document.createElement("span");
   badge.className = `b07-info__badge${confirmed ? " b07-info__badge--confirmed" : ""}`;
-  badge.textContent = confirmed ? L("B07_Info_Confirmed") : L("B07_Info_Provisional");
+  badge.textContent = confirmed
+    ? L("B07_Info_Confirmed")
+    : L("B07_Info_Provisional");
   heading.append(stationName, badge);
   panel.append(heading);
 
@@ -243,7 +261,9 @@ function buildDesignInfoPanel(title: string, design: CrossDesignInfo | null): HT
     infoRow(L("B07_Info_CutSide"), cutSideLabel(design.section_mode)),
     infoRow(
       L("B07_Info_DitchSide"),
-      design.ditch_side === "left" ? L("B06_Design_Ditch_Left") : L("B06_Design_Ditch_Right"),
+      design.ditch_side === "left"
+        ? L("B06_Design_Ditch_Left")
+        : L("B06_Design_Ditch_Right"),
     ),
   );
 
@@ -253,7 +273,10 @@ function buildDesignInfoPanel(title: string, design: CrossDesignInfo | null): HT
   planTitle.textContent = L("B07_Info_Plan_Title");
   plan.append(
     planTitle,
-    infoRow(L("B07_Info_DesignElevation"), `${design.design_elevation_m.toFixed(2)}m`),
+    infoRow(
+      L("B07_Info_DesignElevation"),
+      `${design.design_elevation_m.toFixed(2)}m`,
+    ),
     infoRow(L("B07_Info_CutSlope"), `1:${design.cut_slope_ratio}`),
     infoRow(L("B07_Info_FillSlope"), `1:${design.fill_slope_ratio}`),
     infoRow(L("B07_Info_RoadWidth"), `${design.roadbed_width_m.toFixed(2)}m`),
@@ -279,8 +302,10 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
       fetchWorkflowState(projectId),
       fetchDesignDrawingList(projectId),
     ]);
-    if (workflowResult.status === "fulfilled") workflowState = workflowResult.value;
-    if (drawingResult.status === "fulfilled") drawings = drawingResult.value.drawings;
+    if (workflowResult.status === "fulfilled")
+      workflowState = workflowResult.value;
+    if (drawingResult.status === "fulfilled")
+      drawings = drawingResult.value.drawings;
     else
       drawingError =
         drawingResult.reason instanceof Error
@@ -303,26 +328,32 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
   cadHost.append(frame, license);
 
   let cadReady = false;
-  let pendingLoad: { drawing: CadDrawing; meta: DesignMeta } | undefined;
+  let pendingLoad: { drawing: CadDrawing; meta: DesignMeta | null } | undefined;
   let currentDrawing: DesignDrawingItem | undefined;
   let currentIndex = -1;
   let currentConfirmed = false;
   // 단계 완료 기준은 횡단도만 본다 (종단도 확정 여부는 다음 단계 진행과 무관).
   const isCross = (item: DesignDrawingItem): boolean => item.kind === "cross";
   let allDrawingsConfirmed =
-    drawings.some(isCross) && drawings.filter(isCross).every((item) => item.confirmed);
+    drawings.some(isCross) &&
+    drawings.filter(isCross).every((item) => item.confirmed);
   let resolveSave: ((payload: SaveResult) => void) | undefined;
   let drawingListEl: HTMLElement | undefined;
   const infoPanelHost = document.createElement("div");
   infoPanelHost.className = "b07-info-host";
 
-  const updateInfoPanel = (drawing: DesignDrawingItem, response: DesignDrawingResponse): void => {
+  const updateInfoPanel = (
+    drawing: DesignDrawingItem,
+    response: DesignDrawingResponse,
+  ): void => {
     if (drawing.kind !== "cross") {
       infoPanelHost.replaceChildren();
       return;
     }
     const title = drawing.label;
-    infoPanelHost.replaceChildren(buildDesignInfoPanel(title, response.design ?? null));
+    infoPanelHost.replaceChildren(
+      buildDesignInfoPanel(title, response.design ?? null),
+    );
   };
 
   const confirmButton = createButton({
@@ -338,9 +369,11 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     ) ?? undefined;
 
   const highlightActive = (drawingId: string) => {
-    drawingListEl?.querySelectorAll<HTMLButtonElement>(".b07-drawing-button").forEach((item) => {
-      item.dataset.active = String(item.dataset.drawingId === drawingId);
-    });
+    drawingListEl
+      ?.querySelectorAll<HTMLButtonElement>(".b07-drawing-button")
+      .forEach((item) => {
+        item.dataset.active = String(item.dataset.drawingId === drawingId);
+      });
   };
 
   const buildMeta = (
@@ -357,7 +390,7 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     hasNext: index < drawings.length - 1,
   });
 
-  const sendLoad = (drawing: CadDrawing, meta: DesignMeta) => {
+  const sendLoad = (drawing: CadDrawing, meta: DesignMeta | null) => {
     pendingLoad = { drawing, meta };
     if (!cadReady) return;
     frame.contentWindow?.postMessage(
@@ -378,15 +411,24 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
   const drawingCache = new Map<string, Promise<DesignDrawingResponse>>();
 
   /** 도면 하나를 받아 구조물까지 얹은 응답. 같은 id로 겹쳐 부르면 같은 Promise를 쓴다. */
-  const requestDrawing = (drawing: DesignDrawingItem): Promise<DesignDrawingResponse> => {
+  const requestDrawing = (
+    drawing: DesignDrawingItem,
+  ): Promise<DesignDrawingResponse> => {
     const cached = drawingCache.get(drawing.id);
     if (cached) return cached;
     const request = (async () => {
-      const response = await fetchDesignDrawing(projectId as string, drawing.id);
+      const response = await fetchDesignDrawing(
+        projectId as string,
+        drawing.id,
+      );
       // 구조물(배수관·기슭막이·세월교·BOX·물넘이포장)은 B06 산식이 프론트에 있어
       // 여기서 얹는다. 확정본은 이미 구조물이 담겨 저장돼 있으므로 건드리지 않는다.
       if (drawing.kind === "cross" && !response.confirmed) {
-        await appendStructureEntities(projectId as string, response.route_id, response.drawing);
+        await appendStructureEntities(
+          projectId as string,
+          response.route_id,
+          response.drawing,
+        );
       }
       return response;
     })().catch((error) => {
@@ -426,7 +468,9 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     } catch (error) {
       cadHost.dataset.loading = "false";
       cadHost.dataset.error =
-        error instanceof Error ? error.message : "CAD 도면을 불러오지 못했습니다.";
+        error instanceof Error
+          ? error.message
+          : "CAD 도면을 불러오지 못했습니다.";
     } finally {
       if (button) button.dataset.loading = "false";
     }
@@ -446,7 +490,10 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
   const requestCadDrawing = (): Promise<SaveResult> =>
     new Promise((resolve, reject) => {
       resolveSave = resolve;
-      frame.contentWindow?.postMessage({ type: CAD_SAVE_REQUEST_MESSAGE }, window.location.origin);
+      frame.contentWindow?.postMessage(
+        { type: CAD_SAVE_REQUEST_MESSAGE },
+        window.location.origin,
+      );
       window.setTimeout(() => {
         if (!resolveSave) return;
         resolveSave = undefined;
@@ -485,7 +532,9 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
       }
     } catch (error) {
       showToast(
-        error instanceof Error ? error.message : "현재 도면을 확정하지 못했습니다.",
+        error instanceof Error
+          ? error.message
+          : "현재 도면을 확정하지 못했습니다.",
         "error",
       );
     } finally {
@@ -508,15 +557,32 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
         await invalidateDesignDrawing(projectId, currentDrawing.id);
       } catch (error) {
         showToast(
-          error instanceof Error ? error.message : "도면 확정 상태를 되돌리지 못했습니다.",
+          error instanceof Error
+            ? error.message
+            : "도면 확정 상태를 되돌리지 못했습니다.",
           "error",
         );
       }
     }
   };
 
+  const frameEditor = createFrameTemplateEditor({
+    projectId: projectId as string,
+    sendLoad,
+    requestCadDrawing: async () => (await requestCadDrawing()).drawing,
+    restoreDrawing: () => {
+      if (currentDrawing) void loadDrawing(currentDrawing, currentIndex);
+    },
+    onSaved: () => drawingCache.clear(),
+  });
+  cadHost.prepend(frameEditor.banner);
+
   window.addEventListener("message", (event: MessageEvent<unknown>) => {
-    if (event.origin !== window.location.origin || event.source !== frame.contentWindow) return;
+    if (
+      event.origin !== window.location.origin ||
+      event.source !== frame.contentWindow
+    )
+      return;
     const message = event.data as {
       type?: string;
       detail?: string;
@@ -533,7 +599,8 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
         (item) => item === message.kind,
       );
       // autoClose:false로 온 안내(백업 되살리기)는 오래 띄운다 — 누를 시간을 준다.
-      const duration = message.durationMs === 0 ? 15000 : (message.durationMs ?? 3000);
+      const duration =
+        message.durationMs === 0 ? 15000 : (message.durationMs ?? 3000);
       const actionId = message.actionId;
       showToast(
         message.text ?? "",
@@ -553,25 +620,38 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     } else if (message.type === CAD_LOADED_MESSAGE) {
       cadHost.dataset.loading = "false";
     } else if (message.type === CAD_ERROR_MESSAGE) {
-      cadHost.dataset.error = message.detail ?? "CAD 도면을 표시하지 못했습니다.";
+      cadHost.dataset.error =
+        message.detail ?? "CAD 도면을 표시하지 못했습니다.";
     } else if (message.type === CAD_CHANGED_MESSAGE) {
-      void invalidateCurrentDrawing();
+      // 도각을 고치는 중에 온 변경 알림은 도면 편집이 아니다 — 확정을 풀면 안 된다.
+      if (!frameEditor.isEditing()) void invalidateCurrentDrawing();
     } else if (message.type === CAD_NAVIGATE_MESSAGE && message.direction) {
       navigateDrawing(message.direction);
-    } else if (message.type === CAD_SAVE_RESPONSE_MESSAGE && message.drawing && resolveSave) {
+    } else if (
+      message.type === CAD_SAVE_RESPONSE_MESSAGE &&
+      message.drawing &&
+      resolveSave
+    ) {
       const resolve = resolveSave;
       resolveSave = undefined;
-      resolve({ drawing: message.drawing, quantityTable: message.quantityTable ?? null });
+      resolve({
+        drawing: message.drawing,
+        quantityTable: message.quantityTable ?? null,
+      });
     }
   });
 
-  const drawingPanel = buildDrawingSidePanel(drawings, selectDrawing, drawingError);
+  const drawingPanel = buildDrawingSidePanel(
+    drawings,
+    selectDrawing,
+    drawingError,
+  );
   drawingListEl = drawingPanel;
   const confirmActions = document.createElement("div");
   // 하단 고정은 공용 ui-sidebar-actions로 통일 — 사이드 본문이 [스크롤 영역][액션 줄]로
   // 쪼개지고 액션 줄은 스크롤 밖에 남는다(2026-08-18 사용자 지시, B04~B07 공통).
   confirmActions.className = "b07-drawing-actions ui-sidebar-actions";
-  confirmActions.append(confirmButton);
+  confirmActions.append(frameEditor.button, confirmButton);
 
   drawingPanel.append(infoPanelHost, confirmActions);
 
@@ -587,7 +667,10 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     onStepClick: (stepIndex) => {
       if (!projectId) return;
       if (stepIndex > 5 && !allDrawingsConfirmed) {
-        showToast("모든 설계 도면을 확정한 뒤 다음 단계로 이동할 수 있습니다.", "warning");
+        showToast(
+          "모든 설계 도면을 확정한 뒤 다음 단계로 이동할 수 있습니다.",
+          "warning",
+        );
         return;
       }
       goToWorkflowStage(projectId, WORKFLOW_STEP_ROUTES[stepIndex]);
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Style.css b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
index 296e0bf3..cb6646f7 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Style.css
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
@@ -111,7 +111,11 @@
 
 /* 확정: 좌측 띠 + 측점 글자색을 함께 성공색으로 반영 */
 .b07-drawing-button[data-confirmed="true"] {
-  border-color: color-mix(in srgb, var(--color-success) 35%, var(--color-border));
+  border-color: color-mix(
+    in srgb,
+    var(--color-success) 35%,
+    var(--color-border)
+  );
   border-left-color: var(--color-success);
 }
 
@@ -231,3 +235,30 @@
   font-size: 0.76rem;
   color: var(--color-text-muted);
 }
+
+/* 도각 편집 모드 띠 — CAD 위에 겹쳐 편집 중임을 알리고 [완료]·[취소]를 준다. */
+.b07-frame-edit {
+  position: absolute;
+  z-index: 3;
+  top: 8px;
+  left: 50%;
+  transform: translateX(-50%);
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-8);
+  padding: 6px 10px;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-cards);
+  background-color: var(--color-surface);
+  box-shadow: 0 6px 18px rgb(0 0 0 / 25%);
+}
+
+.b07-frame-edit__label {
+  font-size: 0.78rem;
+  color: var(--color-text);
+}
+
+.b07-frame-edit > button {
+  padding: 4px 12px;
+  font-size: 0.78rem;
+}