diff --git a/TODO.md b/TODO.md
index 4e7a49ea..0cf4d88b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -53,6 +53,7 @@ https://zhuanlan.zhihu.com/p/33778843
     - [x] `ToolstripItems` (default) property
 - [ ] `<eval Ref="Name"/>` and `<eval Eval="expression"/>` tags
 - [ ] Real visual state: different layouts / different images in different sizes
+  - [ ] `GuiResponsiveContainer` control to trigger level switching
   - [ ] GuiResponsiveLayoutCompositionBase
     - [ ] GuiResponsiveLayoutViewComposition
       Explicitly define views for different size level, with shared item, views should be `GuiResponsiveLayoutCompositionBase`