diff --git a/M01_MasterData/M01_MasterData_UI_LogicLab_Ho.ts b/M01_MasterData/M01_MasterData_UI_LogicLab_Ho.ts
index f76aa17f8..4229f4f45 100644
--- a/M01_MasterData/M01_MasterData_UI_LogicLab_Ho.ts
+++ b/M01_MasterData/M01_MasterData_UI_LogicLab_Ho.ts
@@ -449,17 +449,22 @@ function formulaCell(e: Entry, ctx: HoContext, text = ""): HTMLElement {
 
 const tagOf = (x: object): string | undefined => (x as { 꼬리표?: string }).꼬리표 || undefined;
 const sourceTag = (text: string): HTMLElement => {
-  const tag = createBadge(text, "neutral");
+  const [shown, ...tip] = text.split("\n"); // 첫 줄 = 보임 · 나머지 = 풍선(없으면 같은 글) — 740-2
+  const tag = createBadge(shown, "neutral");
   tag.classList.add("m01lab__src");
-  tag.title = text;
+  tag.title = tip.length ? tip.join(" ") : shown;
   return tag;
 };
 
 function nameCell(e: Entry, label: string, tag: string): HTMLElement {
   return el("div", {
     children: [
-      el("div", { text: label }),
-      ...(e.source ? [sourceTag(e.source)] : []),
+      e.source
+        ? el("div", {
+            className: "m01lab__namerow", // 이름 옆에 꼬리표 — 줄 높이 안 바뀜(740-2)
+            children: [el("span", { text: label }), sourceTag(e.source)],
+          })
+        : el("div", { text: label }),
       ...(e.share && label === e.name ? [createBadge(`${e.share} ${tl("Share")}`, "accent")] : []),
       ...(e.spec ? [el("div", { className: "ui-text ui-text--muted", text: e.spec })] : []),
       ...(e.warn ? [createBadge(`${tx("Calc_UnitWarn")} · ${e.warn}`, "warning")] : []),
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Api_Fetch.ts b/M02_MasterTemplete/M02_MasterTemplete_Api_Fetch.ts
index 9d1194a9b..9a21c40fe 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Api_Fetch.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Api_Fetch.ts
@@ -216,6 +216,17 @@ export const checkLibraryDelete = <T>(
     method: "POST",
     body: JSON.stringify({ 대상: picks }),
   });
+/** [초기화](740-2) — 미리 보기(`미리보기` true) = 걷힐 고침 수 · 아니면 그 층 문서에 씀(`판` 이 다르면 409) */
+export const resetLibrary = (
+  kind: LibraryKind,
+  layer: Layer,
+  owner: string | null,
+  body: { 키: string; 미리보기: boolean; 판?: string },
+): Promise<{ 걷힘: number; 문서: unknown }> =>
+  call(owned(layer, `/layers/${layer}/${kind}-reset`, owner), {
+    method: "POST",
+    body: JSON.stringify(body),
+  });
 /** 복사해 둔 문서 · 폴더 → 이 층 `dest` 아래 새 키(폴더는 안의 것까지 · 같은 폴더 이름 「(1)」) */
 export const pasteLibraryTree = (
   kind: LibraryKind,
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor.css b/M02_MasterTemplete/M02_MasterTemplete_Labor.css
index 4dd499c3d..08eafe004 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor.css
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor.css
@@ -35,6 +35,13 @@
   white-space: nowrap;
 }
 
+/* 740-2 넣어 펼친 줄 출처 꼬리표 — 이름 글 끝에 이어 붙음(줄 높이 그대로 · 넘치면 말줄임) */
+.m02-labrow__born {
+  color: var(--color-text-secondary);
+  font-size: var(--text-caption);
+  font-weight: var(--font-weight-regular, 400);
+}
+
 .m02-labrow__key,
 .m02-labrow__note {
   color: var(--color-text-secondary);
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_Api.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_Api.ts
index 6a2519765..63310b9cf 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor_Api.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_Api.ts
@@ -111,6 +111,8 @@ export interface LaborRow {
   고정?: LaborFixed;
   /** 그 줄 덮개(715-3 · 717-3 단가산출 모달) — 로직 줄 · SK 참조 줄 · 서버가 검사 */
   패치?: LinePatch;
+  /** 넣어 펼친 줄 출처(740-1 · 740-2 꼬리표) — {층, 주인, 키, 이름, 때} · 셈에 안 씀 */
+  본뜬?: Record<string, unknown>;
 }
 /** 자재 세 칸(148-4 · 서버 `M02_Labor_Doc.MARKS` 와 같음) — 빈 칸 = 읽을 때 기본값 · 금액 무관 */
 export const MAT_MARKS = {
@@ -151,6 +153,8 @@ function cleanShown(v: unknown): { 자재표시?: Record<string, MatMarks> } {
   return Object.keys(out).length ? { 자재표시: out } : {};
 }
 export interface LaborMat extends MatMarks {
+  /** 넣어 펼친 자재 출처(740-2) */
+  본뜬?: Record<string, unknown>;
   코드: string;
   이름: string | null;
   규격: string | null;
@@ -192,6 +196,7 @@ export function normalizeLabor(doc: unknown, column: string): LaborDoc {
       ...(r.참조 || r.고정 ? {} : cleanShown(r.자재표시)),
       ...(r.고정 ? { 고정: r.고정 } : {}), // 705-1 — 읽을 때 떨구면 [저장]에서 줄이 사라짐
       ...(r.패치 ? { 패치: r.패치 } : {}), // 717-3 — 떨구면 [저장]에서 줄 덮개가 사라짐
+      ...(r.본뜬 ? { 본뜬: r.본뜬 } : {}), // 740-2 — 출처 꼬리표
     })),
     자재: (d.자재 ?? []).map((m) => ({
       코드: m.코드,
@@ -199,6 +204,7 @@ export function normalizeLabor(doc: unknown, column: string): LaborDoc {
       규격: m.규격 ?? null,
       단위: m.단위 ?? null,
       수량: m.수량 ?? null,
+      ...(m.본뜬 ? { 본뜬: m.본뜬 } : {}), // 740-2
       ...cleanMarks(m),
     })),
   };
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_Born.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_Born.ts
new file mode 100644
index 000000000..660024a55
--- /dev/null
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_Born.ts
@@ -0,0 +1,37 @@
+/* =============================================================================
+ * M02_MasterTemplete_Labor_Born.ts
+ * 일위대가 상세 출처 꼬리표(740-2) — 넣어 펼친 줄 · 자재의 `본뜬` 을 짧은 글로(풍선 = 키 · 이름 · 층 · 때).
+ *   일위대가표 격자 = 비고 칸 글 `bornNote` + 풍선 `tipBorn`(칸 폭 · 줄 높이 안 바뀜)
+ *   줄 표(`Labor_Rows` · `Labor_MatTable`) = 이름 글 끝 `bornSpan`(같은 줄 · 넘치면 말줄임)
+ * 색 단추 아님 · 셈에 안 씀.
+ * ========================================================================== */
+
+import { el } from "@ui/ui_template_elements";
+import { bornText } from "./logic/M02_Born_Tag";
+
+const SPLIT = "\n"; // 글 첫 줄 = 보임 · 나머지 = 풍선
+
+/** 일위대가표 격자 비고 칸 풍선 — `at` = 격자 줄 → 일위대가 줄 번호(담은 로직 뒤 자재) */
+export function tipBorn(
+  root: HTMLElement,
+  at: (row: number) => number | null,
+  born: (n: number) => unknown,
+): void {
+  root.querySelectorAll<HTMLElement>("tr[data-i]").forEach((tr) => {
+    const n = at(Number(tr.dataset.i));
+    const [, ...tip] = n === null ? [] : bornText(born(n)).split(SPLIT);
+    if (tip.length)
+      tr.querySelector<HTMLElement>("td:nth-last-child(2)")?.setAttribute("title", tip.join(" "));
+  });
+}
+
+/** 줄 표 이름 끝 꼬리표 — `본뜬` 이 없으면 null */
+export function bornSpan(born: unknown): HTMLElement | null {
+  const [shown, ...tip] = bornText(born).split(SPLIT);
+  if (!shown) return null;
+  return el("span", {
+    className: "m02-labrow__born",
+    text: ` ${shown}`,
+    attrs: { title: tip.join(" "), "data-born": "" },
+  });
+}
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts
index 78070cdfa..260c6ad08 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts
@@ -19,6 +19,7 @@ import {
 } from "@ui/ui_template_hopyo_grid";
 import type { ItemLogic } from "./M02_MasterTemplete_Api_Fetch";
 import type { LaborCalc, LaborCost, LaborDoc } from "./M02_MasterTemplete_Labor_Api";
+import { bornNote } from "./logic/M02_Born_Tag";
 import { lineId } from "./M02_MasterTemplete_Labor_Calc";
 import { tc } from "./M02_MasterTemplete_Labor_Text";
 import { valueLine } from "./M02_Labor_Values_Model";
@@ -79,7 +80,8 @@ export function laborBlock(
       amounts: money(line?.반영),
       note:
         line?.까닭 ??
-        (calc && qty === null ? tc("Grid_NoQty") : row.참조 ? layerWord(row.참조.층) : row.로직),
+        (bornNote(row.본뜬) || // 740-2 넣은 줄 = 출처 글
+          (calc && qty === null ? tc("Grid_NoQty") : row.참조 ? layerWord(row.참조.층) : row.로직)),
       tag: HOPYO_TAG.pum,
     };
   });
@@ -101,7 +103,7 @@ export function laborBlock(
           ? tc("Grid_NoQty")
           : mat.별도계상 !== "직접계산"
             ? tc("Grid_Apart") // 짝 `settle` 의 aside 와 같은 규칙
-            : mat.코드),
+            : bornNote(mat.본뜬) || mat.코드),
     };
   });
   const lines = [...logicLines, ...matLines];
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_MatTable.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_MatTable.ts
index e4f785c45..7c6be0e7d 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor_MatTable.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_MatTable.ts
@@ -13,6 +13,7 @@ import type {
   LaborCalcMat,
   LaborMat,
 } from "./M02_MasterTemplete_Labor_Api";
+import { bornSpan } from "./M02_MasterTemplete_Labor_Born";
 import { markCells, markHeads } from "./M02_MasterTemplete_Labor_MatMarks";
 import {
   moneyCell,
@@ -66,7 +67,10 @@ export function matTable(data: MatTableData, on?: Omit<RowHandlers, "move">): HT
           el("td", {
             className: "m02-labrow__name",
             children: [
-              el("strong", { text: mat.이름 ?? "" }),
+              el("strong", {
+                text: mat.이름 ?? "",
+                children: [bornSpan(mat.본뜬)].filter((x): x is HTMLElement => !!x),
+              }),
               ...(line?.까닭
                 ? [el("small", { className: "ui-text ui-text--error", text: line.까닭 })]
                 : []),
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_Rows.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_Rows.ts
index eb0cceb42..ac137bf38 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor_Rows.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_Rows.ts
@@ -24,6 +24,7 @@ import type {
   LaborRow,
   MatMarkKey,
 } from "./M02_MasterTemplete_Labor_Api";
+import { bornSpan } from "./M02_MasterTemplete_Labor_Born";
 import { lineId } from "./M02_MasterTemplete_Labor_Calc";
 import { attachRowDrag } from "./M02_MasterTemplete_Labor_RowDrag";
 import { tc } from "./M02_MasterTemplete_Labor_Text";
@@ -414,6 +415,7 @@ export function logicTable(data: LogicTableData, on?: RowHandlers): HTMLElement
               }),
               el("strong", {
                 text: fx?.이름 ?? (row.참조 ? line?.이름 : logic?.이름) ?? row.참조?.키 ?? row.로직,
+                children: [bornSpan(row.본뜬)].filter((x): x is HTMLElement => !!x),
               }),
               ...(values.empty
                 ? [
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Labor_Table.ts b/M02_MasterTemplete/M02_MasterTemplete_Labor_Table.ts
index 7bbbb4138..5d5bf4be9 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Labor_Table.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Labor_Table.ts
@@ -33,6 +33,7 @@ import {
 } from "./M02_MasterTemplete_Labor_Api";
 import type { LaborDetailHandle, LaborDetailOptions } from "./M02_MasterTemplete_Labor_Detail";
 import { laborBlock } from "./M02_MasterTemplete_Labor_Grid";
+import { tipBorn } from "./M02_MasterTemplete_Labor_Born";
 import { unlinkedBar } from "./M02_MasterTemplete_Labor_Unlinked";
 import { pasteInto } from "./M02_MasterTemplete_Labor_Paste";
 import { openLogicPicker, withHopyo } from "./M02_MasterTemplete_Labor_Pick";
@@ -187,6 +188,7 @@ export function mountLaborTable(
       // 칸 초점이 표를 밀면(scroll) 메뉴가 바로 닫힘 — 밀림이 끝난 다음 그림에 엶
       requestAnimationFrame(() => requestAnimationFrame(() => openTreeMenu(ev, menuAt(n))));
     });
+    tipBorn(grid.root, at, (n) => (body.담은로직[n] ?? body.자재[n - body.담은로직.length])?.본뜬); // 740-2
     const bar = unlinkedBar(cur, edit && ((qtyOnly) => changed(qtyOnly))); // 729-3 안 이은 줄 띠
     gridHost.replaceChildren(...(bar ? [bar] : []), grid.root);
     showSource();
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Main_Actions.ts b/M02_MasterTemplete/M02_MasterTemplete_Main_Actions.ts
new file mode 100644
index 000000000..4f02b668f
--- /dev/null
+++ b/M02_MasterTemplete/M02_MasterTemplete_Main_Actions.ts
@@ -0,0 +1,156 @@
+/* =============================================================================
+ * M02_MasterTemplete_Main_Actions.ts
+ * 단가산출 · 일위대가 상세 머리 단추 [초기화] [삭제](740-2 · 738-2 · 요구 579-3 · 581) — 차례 … [초기화] [삭제] [저장].
+ *   [삭제] = 735 경고 창(쓰는 곳 표 · 키) → 나무 지우기 → 목록으로 · 쓰는 곳 없으면 한 줄 물음.
+ *   [초기화] = 서버 `-reset` 미리 보기(걷힐 고침 수) → 물음 → 그 층에 씀 → 다시 읽음.
+ *     덮개 · 뺀줄 · 더한줄 단가를 M01 키 값으로 되돌림 · 옵션(입력값) · 기본정보는 그대로(서버 740-1).
+ *   둘 다 쓰기 권한이 있는 층에서만 보임(`update`) · 상세에 저장 안 한 고침이 있으면 먼저 물음.
+ * ========================================================================== */
+
+import { createButton, showToast } from "@ui/ui_template_elements";
+import { currentLanguageIndex } from "@ui/ui_template_locale";
+import { askConfirm } from "@ui/ui_template_modal";
+import {
+  editPrecomboTree,
+  fetchPrecomboTree,
+  resetLibrary,
+  type LibraryKind,
+} from "./M02_MasterTemplete_Api_Fetch";
+import { askLibraryDelete } from "./M02_MasterTemplete_Library_Delete";
+import { precomboList } from "./M02_MasterTemplete_UI_Side_Precombo";
+import { sangeunList } from "./M02_MasterTemplete_UI_Side_Sangeun";
+import type { Selection } from "./M02_MasterTemplete_UI_Main";
+
+const TEXT = {
+  Reset: ["초기화", "Reset"],
+  ResetTip: [
+    "고친 값을 연결된 M01 키 값으로 되돌림 — 옵션 · 기본정보는 그대로",
+    "Revert edited values to their linked M01 key values — options and basic info stay",
+  ],
+  Delete: ["삭제", "Delete"],
+  DeleteTip: [
+    "이 항목을 지움 — 쓰는 곳이 있으면 먼저 알림",
+    "Delete this item — warns first if used",
+  ],
+  ResetAsk: [
+    "고친 값 {n} 개를 M01 값으로 되돌림{k} — 옵션 · 기본정보는 그대로",
+    "Revert {n} edited value(s) to M01 values{k} — options and basic info stay",
+  ],
+  Restored: [" (빼 둔 줄 {k} 개 되살림)", " ({k} removed line(s) restored)"],
+  Nothing: ["되돌릴 고침이 없음", "Nothing to revert"],
+  Done: ["M01 값으로 되돌렸음", "Reverted to M01 values"],
+  DeleteAsk: ["「{name}」 을(를) 지울까?", "Delete 「{name}」?"],
+  Deleted: ["지웠음", "Deleted"],
+  Failed: ["못 했음 — {why}", "Failed — {why}"],
+} as const;
+const tx = (key: keyof typeof TEXT): string =>
+  String(TEXT[key][currentLanguageIndex as 0 | 1] ?? TEXT[key][0]);
+const fill = (text: string, vars: Record<string, string | number>): string =>
+  Object.entries(vars).reduce((s, [k, v]) => s.replace(`{${k}}`, String(v)), text);
+
+export interface MainActionsCtx {
+  sel: () => Selection | null;
+  /** 지금 읽은 문서의 판 */
+  version: () => string;
+  /** 지금 읽은 문서(저장본) — 뺀 줄 수를 셈 */
+  loaded: () => unknown;
+  confirmLeave: () => Promise<boolean>;
+  open: (sel: Selection | null) => Promise<void>;
+  /** 좌측 목록을 다시 읽음 */
+  changed: () => void;
+}
+
+/** 문서 안 모든 `뺀줄` 길이 합(단가산출 · 일위대가 줄 안 덮개까지) */
+function removedCount(node: unknown): number {
+  if (Array.isArray(node)) return node.reduce<number>((n, x) => n + removedCount(x), 0);
+  if (!node || typeof node !== "object") return 0;
+  return Object.entries(node as Record<string, unknown>).reduce(
+    (n, [k, v]) => n + (k === "뺀줄" && Array.isArray(v) ? v.length : removedCount(v)),
+    0,
+  );
+}
+const why = (error: unknown): string => (error instanceof Error ? error.message : "");
+
+export function createMainActions(ctx: MainActionsCtx): {
+  reset: HTMLButtonElement;
+  del: HTMLButtonElement;
+  update: (writable: boolean) => void;
+} {
+  const reset = createButton({ label: tx("Reset"), variant: "ghost" });
+  const del = createButton({ label: tx("Delete"), variant: "danger-ghost" });
+  reset.title = tx("ResetTip");
+  del.title = tx("DeleteTip");
+  reset.dataset.mainReset = "";
+  del.dataset.mainDelete = "";
+
+  const target = (): { at: Selection; kind: LibraryKind } | null => {
+    const at = ctx.sel();
+    const kind = at?.kind;
+    return at && at.name && (kind === "sangeun" || kind === "precombo") ? { at, kind } : null;
+  };
+
+  reset.addEventListener("click", async () => {
+    const got = target();
+    if (!got || !(await ctx.confirmLeave())) return;
+    const { at, kind } = got;
+    try {
+      const look = await resetLibrary(kind, at.layer, at.owner ?? null, {
+        키: at.name,
+        미리보기: true,
+      });
+      if (!look.걷힘) return void showToast(tx("Nothing"), "success");
+      const k = removedCount(ctx.loaded());
+      const message = fill(tx("ResetAsk"), {
+        n: look.걷힘,
+        k: k ? fill(tx("Restored"), { k }) : "",
+      });
+      if (!(await askConfirm({ message, okLabel: tx("Reset"), danger: true }))) return;
+      await resetLibrary(kind, at.layer, at.owner ?? null, {
+        키: at.name,
+        미리보기: false,
+        판: ctx.version(),
+      });
+      await ctx.open(at); // 다시 그림
+      ctx.changed();
+      showToast(tx("Done"), "success");
+    } catch (error) {
+      showToast(fill(tx("Failed"), { why: why(error) }), "error");
+    }
+  });
+
+  del.addEventListener("click", async () => {
+    const got = target();
+    if (!got || !(await ctx.confirmLeave())) return;
+    const { at, kind } = got;
+    const owner = at.owner ?? null;
+    try {
+      const tree = await fetchPrecomboTree(at.layer, owner, kind);
+      const pick = { 경로: tree.자리?.[at.name] ?? [], 키: at.name };
+      const ask = fill(tx("DeleteAsk"), { name: at.label ?? at.name });
+      const ans = await askLibraryDelete(kind, at.layer, owner, [pick], ask, tx("Delete"));
+      if (!ans.ok) return;
+      await editPrecomboTree(
+        at.layer,
+        { op: "delete", 대상: [pick], ...(ans.sure ? { 확인: true } : {}) },
+        tree.판,
+        owner,
+        kind,
+      );
+      const scope = { layer: at.layer, owner, canWrite: true } as Parameters<typeof sangeunList>[0];
+      await ctx.open(kind === "sangeun" ? sangeunList(scope) : precomboList(scope)); // 목록으로
+      ctx.changed();
+      showToast(tx("Deleted"), "success");
+    } catch (error) {
+      showToast(fill(tx("Failed"), { why: why(error) }), "error");
+    }
+  });
+
+  return {
+    reset,
+    del,
+    update: (writable) => {
+      const on = writable && !!target();
+      reset.hidden = del.hidden = !on;
+    },
+  };
+}
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Sangeun.css b/M02_MasterTemplete/M02_MasterTemplete_Sangeun.css
index 8b20d7adc..88d5bf2f3 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Sangeun.css
+++ b/M02_MasterTemplete/M02_MasterTemplete_Sangeun.css
@@ -52,10 +52,26 @@
   font-weight: var(--font-weight-bold);
 }
 
+/* 740-2 이름 + 출처 꼬리표 한 줄 — 이름이 말줄임으로 줄고 꼬리표는 그대로 */
+.m02-sk .m01lab__namerow {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-4);
+  min-width: 0;
+}
+
+.m02-sk .m01lab__namerow > span:first-child {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 /* 727-2 기초 출처 꼬리표 — 칸 폭 고정 · 넘치면 말줄임(풍선 = 온 글) · 이름 칸 폭을 안 바꿈 */
 .m02-sk .m01lab__src {
   display: inline-block;
-  max-width: 6em;
+  flex: none;
+  max-width: 9em;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
diff --git a/M02_MasterTemplete/M02_MasterTemplete_UI_Main.ts b/M02_MasterTemplete/M02_MasterTemplete_UI_Main.ts
index d68699dba..cde030267 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_UI_Main.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_UI_Main.ts
@@ -39,6 +39,7 @@ import { isPrecombo } from "./M02_MasterTemplete_UI_Side_Precombo";
 import type { SpreadsheetHandle } from "../A00_Common/spreadsheet/spreadsheet";
 import type { LinkOptions } from "../A00_Common/spreadsheet/spreadsheet_links";
 import { createEmpty } from "@ui/ui_template_empty";
+import { createMainActions } from "./M02_MasterTemplete_Main_Actions";
 export interface Selection {
   layer: Layer;
   projectId: string | null;
@@ -141,6 +142,15 @@ export function createMain(
   const title = el("h2", { className: "m02-main__title", text: L("M02_PickTemplate") });
   const reload = createButton({ label: L("M02_Reload"), variant: "ghost" });
   const save = createButton({ label: L("M02_Save"), variant: "filled" });
+  // 단가산출 · 일위대가 상세 [초기화] [삭제](740-2 · 738-2) — 차례 … [초기화] [삭제] [저장]
+  const actions = createMainActions({
+    sel: () => sel,
+    version: () => version,
+    loaded: () => loaded,
+    confirmLeave: () => confirmLeave(),
+    open: (at) => open(at),
+    changed: () => onSaved?.(),
+  });
   // 구조물 도면 · 일위대가 · 면적산출 상세 화면 → 구조물집계표(그 열 고른 채) · 일반 단추(43-5 · 알약 · ghost 아님)
   const back = createButton({ label: L("M02_Back") });
   const helpSlot = el("span", { className: "m02-main__help" }); // 상세 [?](49-7) — 제목 바로 옆
@@ -171,6 +181,8 @@ export function createMain(
           helpSlot,
           slot,
           reload,
+          actions.reset,
+          actions.del,
           save,
           ...(extras.newItem ? [extras.newItem] : []),
         ],
@@ -256,6 +268,7 @@ export function createMain(
   const bar = (): void => {
     reload.hidden = !sel;
     save.hidden = !sel || !writable(sel);
+    actions.update(!!sel && writable(sel));
     back.hidden = !sel || !(sel.kind in NUMBER_FIELD);
     nav.update(back.hidden ? null : sel); // 보임 조건 = 뒤로 단추와 같음
     const kind = sel && sel.kind in HELP_TITLE ? (sel.kind as keyof typeof HELP_TITLE) : null;
diff --git a/M02_MasterTemplete/logic/M02_Born_Tag.ts b/M02_MasterTemplete/logic/M02_Born_Tag.ts
new file mode 100644
index 000000000..fb6021aae
--- /dev/null
+++ b/M02_MasterTemplete/logic/M02_Born_Tag.ts
@@ -0,0 +1,53 @@
+/* =============================================================================
+ * M02_Born_Tag.ts
+ * 넣은 줄 출처 꼬리표(740-2 · 요구 581) — 서버 `본뜬 {층, 주인, 키, 이름, 때}`(740-1) → 화면 글.
+ * 순수 계산 — 화면 · fetch 없음. 첫 줄 = 줄 옆에 보이는 짧은 글 · 둘째 줄 = 풍선(키 · 이름 · 층 · 때).
+ * 공용 상세 꼬리표 칸(`LogicLab_Ho` sourceTag)이 「\n」 앞만 보이고 전체를 풍선으로 씀.
+ * ========================================================================== */
+
+export interface Born {
+  층?: string | null;
+  주인?: string | null;
+  키?: string | null;
+  이름?: string | null;
+  때?: string | null;
+}
+
+const LAYER: Record<string, string> = {
+  system: "마스터",
+  company: "회사",
+  personal: "개인",
+  project: "프로젝트",
+};
+
+/** 서버 때(UTC) → 이 컴퓨터 시각 「2026-11-02 20:13」 · 읽을 수 없으면 "" */
+function localTime(at: unknown): string {
+  const d = new Date(String(at ?? ""));
+  if (Number.isNaN(d.getTime())) return "";
+  const z = (n: number): string => String(n).padStart(2, "0");
+  return `${d.getFullYear()}-${z(d.getMonth() + 1)}-${z(d.getDate())} ${z(d.getHours())}:${z(d.getMinutes())}`;
+}
+
+/** `본뜬` 한 벌 → 꼬리표 글(없으면 ""). `before` = 이미 있는 꼬리표(기초 원문번호) — 앞에 둠 */
+export function bornText(born: unknown, before = ""): string {
+  const b = born && typeof born === "object" ? (born as Born) : null;
+  if (!b || (!b.키 && !b.이름)) return before;
+  const shown = `${before ? `${before} · ` : ""}본뜬 ${b.키 ?? b.이름}`;
+  const layer = LAYER[String(b.층 ?? "")] ?? String(b.층 ?? "");
+  const tip = [`${b.키 ?? ""} ${b.이름 ?? ""}`.trim(), layer, localTime(b.때)]
+    .filter(Boolean)
+    .join(" · ");
+  return `${shown}\n${tip}`;
+}
+
+/** 단가산출 줄 열쇠(`add:#k` · `add:#k/…`) → 그 더한줄의 꼬리표 글 */
+export function bornOfCid(cid: string, adds: readonly object[] | undefined, before = ""): string {
+  const hit = /^add:#(\d+)/.exec(cid);
+  return bornText(
+    hit ? (adds?.[Number(hit[1])] as { 본뜬?: unknown } | undefined)?.본뜬 : undefined,
+    before,
+  );
+}
+
+/** 격자 비고 칸 글 — 「본뜬 SK-000012」 · 없으면 "" (첫 줄만) */
+export const bornNote = (born: unknown): string => bornText(born).split("\n")[0];
diff --git a/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts b/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
index 9a871b294..de6ae19bd 100644
--- a/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
+++ b/M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts
@@ -13,6 +13,7 @@
  * 화면 · fetch · sessionStorage 없음(`CLAUDE.md` 4장).
  * ========================================================================== */
 
+import { bornOfCid } from "./M02_Born_Tag";
 import type { SheetGroup } from "../../A00_Common/calc_sheet";
 
 export type CoverPart = "labor" | "material" | "expense";
@@ -470,7 +471,8 @@ export function hoView(
     const l = lineBy.get(cid);
     const name = l?.이름 ?? cid;
     const at = subOf(cid);
-    const tag = tags.has(cid) ? { 꼬리표: tags.get(cid) } : {};
+    const born = bornOfCid(cid, doc.더한줄, tags.get(cid) ?? ""); // 넣은 줄 출처(740-2) — 기초 번호 뒤에 붙임
+    const tag = born ? { 꼬리표: born } : {};
     if ((at?.cid ?? cid).startsWith("pct:")) {
       extra.push([cid, { ...((known.get(cid) as HoExtra) ?? { 이름: name, 식: "" }), ...tag }]);
       continue;
diff --git a/resources/tester/test_704_3_hopyo_grid.py b/resources/tester/test_704_3_hopyo_grid.py
index 96bc0d304..fc847ea37 100644
--- a/resources/tester/test_704_3_hopyo_grid.py
+++ b/resources/tester/test_704_3_hopyo_grid.py
@@ -96,6 +96,7 @@ CALC = {"줄": [{"로직": "GF1", "분모": "㎡", "배": 10, "수량": 2.09,
 def test_M02_문서_calc_를_격자_줄로():
     files = [GRID, "M02_MasterTemplete/M02_MasterTemplete_Labor_Calc.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Spec.ts",
+             "M02_MasterTemplete/logic/M02_Born_Tag.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts"]  # fmt: skip
     logics = [
         ["GF1", {"이름": "돌쌓기 찰쌓기", "입력": [], "결과단위": "㎡"}],
@@ -146,6 +147,7 @@ def test_세_곳_같은_부품():
 def test_번호는_글에_안_냄_사람_글은_그대로():
     files = [GRID, "M02_MasterTemplete/M02_MasterTemplete_Labor_Calc.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Spec.ts",
+             "M02_MasterTemplete/logic/M02_Born_Tag.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts"]  # fmt: skip
     ref = {"로직": "", "별칭": None, "입력값": {}, "수량": {"손": 1},
            "참조": {"층": "personal", "주인": "1/3", "키": "SC-000002"}}  # fmt: skip
diff --git a/resources/tester/test_704_4_spec.py b/resources/tester/test_704_4_spec.py
index 7d88c72a0..27471fdc1 100644
--- a/resources/tester/test_704_4_spec.py
+++ b/resources/tester/test_704_4_spec.py
@@ -176,6 +176,7 @@ def test_격자_규격_열_수량_칸_열마다():
 
     files = [g.GRID, "M02_MasterTemplete/M02_MasterTemplete_Labor_Calc.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Spec.ts",
+             "M02_MasterTemplete/logic/M02_Born_Tag.ts",
              "M02_MasterTemplete/M02_MasterTemplete_Labor_Grid.ts"]  # fmt: skip
     doc = {**g.DOC, "규격": {"이름": "H", "열": ["1.5", "2.0"], "기본": "2.0",
                              "수량": {"GF1": {"1.5": 1.5, "2.0": 2.09}, "MT1": {"1.5": 4}}}}  # fmt: skip
diff --git a/resources/tester/test_717_2b_sangeun_detail.py b/resources/tester/test_717_2b_sangeun_detail.py
index cacc11c8f..c63c353a7 100644
--- a/resources/tester/test_717_2b_sangeun_detail.py
+++ b/resources/tester/test_717_2b_sangeun_detail.py
@@ -9,6 +9,7 @@
 """
 
 import json
+import re
 import shutil
 import subprocess
 from decimal import Decimal
@@ -32,7 +33,9 @@ def _text(p: Path) -> str:
 
 
 def _node(body: str) -> object:
-    src = _text(MODEL) + "\n" + body
+    born = _text(M02 / "logic" / "M02_Born_Tag.ts")  # 740-2 — 모델이 쓰는 꼬리표 글(import 줄은 뺌)
+    model = re.sub(r"^import .*$", "", _text(MODEL), flags=re.M)
+    src = born + "\n" + model + "\n" + body
     out = subprocess.run(
         ["node", "--experimental-strip-types", "--no-warnings",
          "--input-type=module-typescript", "-e", src],
diff --git a/resources/tester/test_727_sk_base_add.py b/resources/tester/test_727_sk_base_add.py
index 8b4fda491..ad29b9a54 100644
--- a/resources/tester/test_727_sk_base_add.py
+++ b/resources/tester/test_727_sk_base_add.py
@@ -206,7 +206,13 @@ def _model(ans, doc, script):
         f"\nconst ans = {json.dumps(ans, ensure_ascii=False)};"
         f"\nconst doc = {json.dumps(doc, ensure_ascii=False)};\n{script}"
     )
-    return _node(["M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts"], body)
+    return _node(
+        [
+            "M02_MasterTemplete/logic/M02_Born_Tag.ts",
+            "M02_MasterTemplete/logic/M02_Sangeun_Cover_Model.ts",
+        ],
+        body,
+    )
 
 
 def test_727_2_화면_꼴_세부_줄_고침(world):  # noqa: F811
diff --git a/resources/tester/test_740_2_reset_delete_born.py b/resources/tester/test_740_2_reset_delete_born.py
new file mode 100644
index 000000000..eca187d26
--- /dev/null
+++ b/resources/tester/test_740_2_reset_delete_born.py
@@ -0,0 +1,93 @@
+"""740-2 · 738-2 상세 머리 [초기화] [삭제] · 출처 꼬리표 지킴 시험(서버 · 화면 없음)."""
+
+import json
+import re
+import subprocess
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+M02 = ROOT / "M02_MasterTemplete"
+MAIN = (M02 / "M02_MasterTemplete_UI_Main.ts").read_text(encoding="utf-8")
+ACTIONS = (M02 / "M02_MasterTemplete_Main_Actions.ts").read_text(encoding="utf-8")
+HO = (ROOT / "M01_MasterData" / "M01_MasterData_UI_LogicLab_Ho.ts").read_text(encoding="utf-8")
+COVER = (M02 / "logic" / "M02_Sangeun_Cover_Model.ts").read_text(encoding="utf-8")
+
+
+def _born(expr: str):
+    """순수 TS(`logic/M02_Born_Tag.ts`)를 Node 로 돌려 JSON 답을 받음."""
+    uri = (M02 / "logic" / "M02_Born_Tag.ts").as_uri()
+    code = (
+        f"import {{ bornText, bornOfCid, bornNote }} from '{uri}';"
+        f"console.log(JSON.stringify({expr}));"
+    )
+    out = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", "--experimental-strip-types", "--no-warnings", "--input-type=module", "-e", code],
+        capture_output=True,
+        text=True,
+        check=True,
+        cwd=ROOT,
+    )
+    return json.loads(out.stdout)
+
+
+BORN = {
+    "층": "personal",
+    "주인": "u1",
+    "키": "SK-000012",
+    "이름": "강관비계",
+    "때": "2026-11-02T06:30:12Z",
+}
+
+
+def test_꼬리표_글_첫줄_짧게_둘째줄_풍선():
+    shown, tip = _born(f"bornText({json.dumps(BORN, ensure_ascii=False)})").split("\n")
+    assert shown == "본뜬 SK-000012"
+    assert "SK-000012 강관비계" in tip and "개인" in tip
+    assert re.search(r"\d{4}-\d\d-\d\d \d\d:\d\d", tip)  # 이 컴퓨터 시각 · 시간대 따라 값이 다름
+
+
+def test_꼬리표_없으면_빈칸_기초번호_뒤에_붙음():
+    assert _born("bornText(null)") == ""
+    assert _born("bornText(undefined, 'A1')") == "A1"
+    got = _born(f"bornText({json.dumps(BORN, ensure_ascii=False)}, 'A1')")
+    assert got.split("\n")[0] == "A1 · 본뜬 SK-000012"
+
+
+def test_줄_열쇠에서_그_더한줄_출처를_찾음():
+    adds = json.dumps([{}, {"본뜬": BORN}], ensure_ascii=False)
+    assert _born(f"bornOfCid('add:#1', {adds})").startswith("본뜬 SK-000012")
+    assert _born(f"bornOfCid('add:#1/add:#0', {adds})").startswith("본뜬 SK-000012")  # 펼침 세부
+    assert _born(f"bornOfCid('add:#0', {adds})") == ""
+    assert _born(f"bornOfCid('hopyo:X#3', {adds})") == ""
+
+
+def test_머리_단추_차례_초기화_삭제_저장():
+    kids = MAIN[MAIN.index('className: "m02-main__head"') :]
+    kids = kids[: kids.index("]")]
+    order = [kids.index(w) for w in ("reload,", "actions.reset,", "actions.del,", "save,")]
+    assert order == sorted(order)
+    assert "actions.update(" in MAIN  # 쓰기 권한 없는 층 = 안 보임
+
+
+def test_삭제는_735_경고_창을_그대로_씀():
+    assert "askLibraryDelete(" in ACTIONS and '"delete"' in ACTIONS
+    assert "sure ? { 확인: true }" in ACTIONS.replace(
+        "ans.sure", "sure"
+    )  # 확인 몸 = 쓰는 곳 줄까지
+    assert "sangeunList(" in ACTIONS and "precomboList(" in ACTIONS  # 지운 뒤 목록으로
+
+
+def test_초기화는_미리보기_뒤_물음_뒤_씀():
+    assert ACTIONS.index("미리보기: true") < ACTIONS.index("미리보기: false")
+    assert "ctx.confirmLeave()" in ACTIONS  # 저장 안 한 고침 먼저 물음
+    assert "옵션 · 기본정보는 그대로" in ACTIONS
+
+
+def test_공용_꼬리표_칸은_첫줄만_보이고_풍선에_나머지():
+    assert 'text.split("\\n")' in HO
+    assert "bornOfCid(" in COVER
+
+
+def test_격자_비고_칸은_첫줄만():
+    assert _born(f"bornNote({json.dumps(BORN, ensure_ascii=False)})") == "본뜬 SK-000012"
+    assert _born("bornNote(null)") == ""