diff --git a/M02_MasterTemplete/M02_MasterTemplete_UI_Side_Library.ts b/M02_MasterTemplete/M02_MasterTemplete_UI_Side_Library.ts
index 5bdbad680..7bb16a460 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_UI_Side_Library.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_UI_Side_Library.ts
@@ -143,6 +143,8 @@ export function buildLibrarySection(opt: LibraryOptions): LibraryHandle {
   add.classList.add("m02-tree__add");
   add.title = L("M02_TreeAddTop");
   add.setAttribute("aria-label", L("M02_TreeAddTop"));
+  // 구조물 조합 줄과 같은 자리(줄 오른쪽 끝 · `m02-tree__tools`)
+  const addTools = el("span", { className: "ui-toolbar m02-tree__tools", children: [add] });
   const leaves = new Map<string, HTMLElement>();
   const toggled = new Map<string, boolean>(); // 손으로 펴고 접은 폴더 — 다시 그려도 그대로
   const targets = new Map<string, Target>();
@@ -470,7 +472,7 @@ export function buildLibrarySection(opt: LibraryOptions): LibraryHandle {
     const mine = ++seq;
     const at = opt.scope();
     add.hidden = !at.canWrite;
-    barHost.replaceChildren(opt.bar(add));
+    barHost.replaceChildren(opt.bar(addTools));
     if (!keep) treeHost.replaceChildren(createEmpty({ text: tc("Loading"), small: true }));
     const [got, tree] = await Promise.all([
       // 못 받으면 빈 나무(목록표에서 까닭) · 폴더를 못 받으면 문서는 모두 뿌리
diff --git a/resources/tester/test_720_m02_folder_layer.py b/resources/tester/test_720_m02_folder_layer.py
index d22012be0..511e97ab0 100644
--- a/resources/tester/test_720_m02_folder_layer.py
+++ b/resources/tester/test_720_m02_folder_layer.py
@@ -64,7 +64,7 @@ def test_화면_층_단추_최상위_폴더_이름_바꾸기():
     # 720-2 — 층 줄 「+」 = 서고 칸 맨 위 메뉴 · 메뉴 줄 = 같은 addFolder([])
     assert page.count("      add,\n") == 3  # 구조물 조합 · 일위대가 · 단가산출
     assert "onClick: (event) => openTreeMenu(event, menuAt([]))" in lib
-    assert "add.hidden = !at.canWrite;" in lib and "opt.bar(add)" in lib
+    assert "add.hidden = !at.canWrite;" in lib and "opt.bar(addTools)" in lib
     assert lib.count('L("M02_TreeAddTopFolder"), () => void addFolder([])') == 1  # 폴더 줄
     assert '{ label: L("M02_TreeAddTopFolder"), run: () => void addFolder([])' in lib  # 문서 줄
     tree = _text("M02_MasterTemplete_TreePanel.ts")