diff --git a/docker/frontend/src/Library.tsx b/docker/frontend/src/Library.tsx
index fbfad40..1b597df 100644
--- a/docker/frontend/src/Library.tsx
+++ b/docker/frontend/src/Library.tsx
@@ -82,7 +82,11 @@ const NODE_KEY = 'recipescam.library.node';
 const FRAME_KEY = 'recipescam.library.frame';
 const COLUMN_KEY = 'recipescam.library.column';
 const OPEN_KEY = 'recipescam.library.open';
-const DEEP_KEY = 'recipescam.library.deep';
+// The name moved with the default: subfolders used to be drawn unless the reader
+// shut them out, and the chip wrote that first answer down on the very first
+// visit — so the old key holds 'true' for every reader who never touched it, and
+// reading it would keep them on a default they never chose.
+const DEEP_KEY = 'recipescam.library.deep2';
 const VIEW_KEY = 'recipescam.library.view';
 const SORT_BY_KEY = 'recipescam.library.sortBy';
 const SORT_DIR_KEY = 'recipescam.library.sortDir';
@@ -327,10 +331,12 @@ function Catalogue() {
     return set;
   });
   // Whether the strip draws the whole branch under the open node or only the
-  // node itself. Deep is how a roll reads — its top level holds no file of its
-  // own — and shallow is what a folder of folders is for. The reader's answer is
-  // picked up where the last visit left it, the same as the open node above.
-  const [deep, setDeep] = useState(() => recall(DEEP_KEY) !== 'false');
+  // node itself. The node the reader picked is what the screen shows: the frames
+  // in the folders under it are asked for, not assumed. A roll whose top level
+  // holds date folders then reads as those folders, and the frames behind them
+  // arrive when the reader says so. The answer is picked up where the last visit
+  // left it, the same as the open node above.
+  const [deep, setDeep] = useState(() => recall(DEEP_KEY) === 'true');
   // The frame that is up in the open node — raised by a click on its thumbnail,
   // and picked up where the last visit left it, so a reader who leaves for the
   // studio comes back to the negative they were looking at rather than to the
@@ -1086,9 +1092,8 @@ function Catalogue() {
     setNode(nodes.find((n) => n.key === node.split('/')[0])?.key ?? nodes[0]?.key ?? null);
   }, [loaded, node, nodes]);
 
-  // What the open node draws: its own frames, and — unless the branch has been
-  // shut out of the strip — the ones in every subfolder under it, because a
-  // roll's top level usually holds no file of its own.
+  // What the open node draws: its own frames, and — when the reader has asked
+  // for the branch — the ones in every subfolder under it.
   const shown = useMemo(() => {
     if (!rootName) return photos;
     const normRoot = rootName.replace(/\\/g, '/');