diff --git a/docker/frontend/scripts/library-check.mjs b/docker/frontend/scripts/library-check.mjs
index 7ea460e..b7b85ff 100644
--- a/docker/frontend/scripts/library-check.mjs
+++ b/docker/frontend/scripts/library-check.mjs
@@ -386,10 +386,21 @@ await page.waitForFunction(() => document.querySelectorAll('[data-key^="lib-node
 });
 const deepRows = await page.$$eval('[data-key^="lib-node-"]', (els) => els.length);
 const deepTiles = await page.$$eval(thumbs, (els) => els.length);
+// The row is where a reader right-clicks, so fold-the-tree leads that row's own
+// menu rather than living only on the column's name above it.
+await page.click('[data-key="lib-node-CheckRoll"]', { button: 'right' });
+await page.waitForSelector('[data-key="lib-menu"]', { timeout: 10_000 });
+const rowMenu = await page.$$eval('[data-key="lib-menu"] button', (els) => els.map((b) => b.dataset.key));
+step(
+  'a right click on the top-level folder row offers to fold the tree',
+  rowMenu.join(',') === 'lib-menu-collapse,lib-rename-CheckRoll,lib-rescan-CheckRoll,lib-drop-CheckRoll',
+  JSON.stringify(rowMenu),
+);
+await page.keyboard.press('Escape');
 await page.click('[data-key="lib-root-name"]', { button: 'right' });
 await page.waitForSelector('[data-key="lib-menu"]', { timeout: 10_000 });
 const head = await page.$$eval('[data-key="lib-menu"] button', (els) => els.map((b) => b.dataset.key));
-step('a right click on the root name offers to fold the tree', head.join(',') === 'lib-menu-collapse', JSON.stringify(head));
+step('a right click on the column name offers it alone', head.join(',') === 'lib-menu-collapse', JSON.stringify(head));
 step(
   'the column name still reads as the folder it belongs to',
   (await page.$eval('[data-key="lib-root-name"]', (e) => e.textContent)) === 'Roll A',
diff --git a/docker/frontend/src/Library.tsx b/docker/frontend/src/Library.tsx
index c814586..c121cc8 100644
--- a/docker/frontend/src/Library.tsx
+++ b/docker/frontend/src/Library.tsx
@@ -107,8 +107,9 @@ export function Library() {
   const [note, setNote] = useState<string | null>(null);
   // The folder menu: what a right click opens, and where. No folder means the
   // right click landed on the empty part of the column, which is the way in for
-  // one more folder; `root` means it landed on the column's own name — the head
-  // of the tree, whose one act is folding the whole roll.
+  // one more folder; `root` means it landed on the head of a tree — the column's
+  // own name, or the row of a folder picked at the top level — which carries
+  // folding every row that has something under it.
   const [menu, setMenu] = useState<{ folder: LibraryFolder | null; root?: boolean; x: number; y: number } | null>(null);
   // Where the drag of the column divider started, and how wide the column was
   // then — the pointer only ever reports a position, not a distance moved.
@@ -563,14 +564,18 @@ export function Library() {
                           }}
                           // A folder's own menu: rename, scan again, forget. All three
                           // act on the folder that was picked, so a right click on a
-                          // subfolder row brings up its roll's menu. Shift+F10 raises
-                          // the same event, which is the keyboard's way in.
+                          // subfolder row brings up its roll's menu. A row at the top
+                          // level is a whole tree's head, so it also carries folding
+                          // the tree — the item the column's own name has, where a
+                          // reader actually right-clicks. Shift+F10 raises the same
+                          // event, which is the keyboard's way in.
                           onContextMenu={(e) => {
                             if (!folder) return;
                             e.preventDefault();
                             const box = e.currentTarget.getBoundingClientRect();
                             setMenu({
                               folder,
+                              root: n.depth === 0,
                               x: Math.min(e.clientX || box.left, window.innerWidth - 190),
                               y: Math.min(e.clientY || box.top, window.innerHeight - 96),
                             });
@@ -715,14 +720,15 @@ export function Library() {
 
       {/* The context menu: a folder gets what belongs to a folder rather than to a
           frame, the empty part of the column gets the folder that is missing, and
-          the column's own name gets the whole tree folded. A folder whose
+          the head of the tree gets the whole tree folded. A folder whose
           permission has lapsed gets the one thing that can be done about it. */}
       {menu ? (
         <div className="lib-menu" data-key="lib-menu" style={{ left: menu.x, top: menu.y }} onContextMenu={(e) => e.preventDefault()}>
+          {/* Fold-the-tree leads the menu of a top-level row, and stands alone on
+              the column's own name: every row that has something under it goes,
+              so a long roll comes back to one line per folder and the click that
+              folds a row still opens it again one at a time. */}
           {menu.root ? (
-            // Every row that has something under it, the root's own included: a
-            // long roll comes back to one line per folder, and the click that
-            // folds a row still opens it again one at a time.
             <button
               type="button"
               className="lib-menu-item"
@@ -735,20 +741,9 @@ export function Library() {
             >
               {t('lib.collapseAll')}
             </button>
-          ) : !menu.folder ? (
-            <button
-              type="button"
-              className="lib-menu-item"
-              data-key="lib-menu-add"
-              disabled={!!live}
-              onClick={() => {
-                setMenu(null);
-                void add();
-              }}
-            >
-              {t('lib.add')}
-            </button>
-          ) : ready.has(menu.folder.name) ? (
+          ) : null}
+          {menu.folder ? (
+            ready.has(menu.folder.name) ? (
             <>
               <button
                 type="button"
@@ -798,6 +793,20 @@ export function Library() {
             >
               {t('lib.reconnect')}
             </button>
+            )
+          ) : menu.root ? null : (
+            <button
+              type="button"
+              className="lib-menu-item"
+              data-key="lib-menu-add"
+              disabled={!!live}
+              onClick={() => {
+                setMenu(null);
+                void add();
+              }}
+            >
+              {t('lib.add')}
+            </button>
           )}
         </div>
       ) : null}