diff --git a/klausur-service/backend/grid_editor_api.py b/klausur-service/backend/grid_editor_api.py
index 6d657bb..a04836c 100644
--- a/klausur-service/backend/grid_editor_api.py
+++ b/klausur-service/backend/grid_editor_api.py
@@ -1938,13 +1938,15 @@ async def _build_grid_core(session_id: str, session: dict) -> dict:
                         "bbox_pct": last_cells[0].get("bbox_pct", {}),
                     })
 
-        # Remove footer rows from the table
+        # Mark footer rows (keep in table, just tag for frontend)
         if footer_rows:
-            remove_ris = {fr["row_index"] for fr in footer_rows}
-            z["cells"] = [c for c in z["cells"]
-                          if c.get("row_index") not in remove_ris]
-            z["rows"] = [r for r in z["rows"]
-                         if r["index"] not in remove_ris]
+            footer_ris = {fr["row_index"] for fr in footer_rows}
+            for r in z["rows"]:
+                if r["index"] in footer_ris:
+                    r["is_footer"] = True
+            for c in z["cells"]:
+                if c.get("row_index") in footer_ris:
+                    c["col_type"] = "footer"
 
         if page_refs or footer_rows:
             logger.info(