diff --git a/src/gui/components/_legacy.py b/src/gui/components/_legacy.py
index b1f5094..e1b6f58 100644
--- a/src/gui/components/_legacy.py
+++ b/src/gui/components/_legacy.py
@@ -787,6 +787,22 @@ a[data-testid="stPageLink-NavLink"][href*="close"] {
     except Exception:
         pass
 
+    # TEMP: visible marker in the main content flow, immediately before
+    # the footer-injection iframe. This lands at the very bottom of
+    # ``stAppViewBlockContainer`` — right where the user reports a
+    # white strip clipping text when scrolling. If this red bar lines
+    # up with the offending strip, the strip is the iframe wrapper
+    # (``stElementContainer`` around ``st.iframe``) or the block
+    # container's ``padding-bottom: 3rem`` reservation.
+    st.markdown(
+        '<div style="background:#ffe0e0;border:2px dashed #b00020;'
+        'color:#b00020;font-weight:700;font-size:13px;text-align:center;'
+        'padding:8px 12px;margin:4px 0;font-family:system-ui,sans-serif;">'
+        '◀ CLAUDE TEST #2 — IS THIS THE WHITE BAR? ▶'
+        '</div>',
+        unsafe_allow_html=True,
+    )
+
     st.iframe(
         f"""
 <script>
@@ -814,16 +830,6 @@ a[data-testid="stPageLink-NavLink"][href*="close"] {
       closeBtn.type = 'button';
       closeBtn.className = 'datatools-footer-btn close';
       closeBtn.textContent = labels.close;
-
-      // TEMP: visible marker so the user can confirm whether
-      // ``#datatools-sticky-footer`` is the "white bar" they want
-      // removed. To be deleted once identification is confirmed.
-      var marker = doc.createElement('span');
-      marker.textContent =
-        '◀ CLAUDE TEST: is this the white bar you want removed? ▶';
-      marker.style.cssText =
-        'color:#b00020;font-weight:700;font-size:12px;'
-        + 'margin-left:0.6rem;font-family:system-ui,sans-serif;';
       // Soft-nav via the hidden ``st.page_link`` that
       // ``render_sticky_footer`` injects. Streamlit owns its click
       // handler and will route through ``st.switch_page`` (same
@@ -858,7 +864,6 @@ a[data-testid="stPageLink-NavLink"][href*="close"] {
 
       div.appendChild(helpBtn);
       div.appendChild(closeBtn);
-      div.appendChild(marker);
 
       var pop = doc.createElement('div');
       pop.id = 'datatools-help-popover';