diff --git a/web/sections/PageBuilderPanel.tsx b/web/sections/PageBuilderPanel.tsx
index aada984..595e848 100644
--- a/web/sections/PageBuilderPanel.tsx
+++ b/web/sections/PageBuilderPanel.tsx
@@ -219,11 +219,23 @@ export const PageBuilderPanel = () => {
 
     The band is found by `data-section-id`, the marker the site already carries for the admin.
   */
+  /*
+    Read inside `onDocument`, which runs against the document that has just LOADED.
+
+    The effect below cannot do that job: bumping `rendered` runs it immediately, while `frameDoc` still
+    points at the outgoing document — so it scrolled the page that was about to be replaced, and the
+    new one arrived at the top. Every write from the editor did that: reorder a gallery, lose your
+    place.
+  */
+  const partRef = useRef<string | null>(part);
+  partRef.current = part;
+
   useEffect(() => {
+    // A different band chosen, with no reload. `smooth`, because you are watching it move.
     if (!part) return;
     const band = frameDoc.current?.querySelector(`[data-section-id="${CSS.escape(part)}"]`);
     band?.scrollIntoView({ behavior: 'smooth', block: 'start' });
-  }, [part, rendered]);
+  }, [part]);
 
   const onDocument = useCallback(
     (frameDocument: Document) => {
@@ -236,6 +248,18 @@ export const PageBuilderPanel = () => {
         the screen where things are placed. It also answers the question a negative margin asks: a
         block escaping the gutter has to be seen escaping it, against the line it crossed.
       */
+      /*
+        Back to where you were, in the document that just arrived.
+
+        `auto` and not `smooth`: this is a fresh document and there is nothing to watch move — a smooth
+        scroll from the top would animate past everything above the band for no reason.
+      */
+      if (partRef.current) {
+        frameDocument
+          .querySelector(`[data-section-id="${CSS.escape(partRef.current)}"]`)
+          ?.scrollIntoView({ behavior: 'auto', block: 'start' });
+      }
+
       const measure = paintMeasure(frameDocument);
       const selection = paintSelection(frameDocument, {
         sections,