diff --git a/lib/widget/viewer.dart b/lib/widget/viewer.dart
index a4f7b3a6..166bd887 100644
--- a/lib/widget/viewer.dart
+++ b/lib/widget/viewer.dart
@@ -670,7 +670,7 @@ class _ViewerState extends State<Viewer> {
     if (flag) {
       SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values);
     } else {
-      SystemChrome.setEnabledSystemUIOverlays([SystemUiOverlay.bottom]);
+      SystemChrome.setEnabledSystemUIOverlays([]);
     }
   }