diff --git a/README.md b/README.md
index c579f013..103950f1 100644
--- a/README.md
+++ b/README.md
@@ -196,6 +196,7 @@ lua <<EOF
 EOF
 ```
 All mappings are set in `normal mode`.
+You can toggle the help UI by pressing `?`.
 
 ## Note
 
diff --git a/doc/nvim-tree-lua.txt b/doc/nvim-tree-lua.txt
index 9ffb146f..72cc0fa8 100644
--- a/doc/nvim-tree-lua.txt
+++ b/doc/nvim-tree-lua.txt
@@ -308,6 +308,7 @@ INFORMATIONS				        *nvim-tree-info*
 
 |KeyBindings|				        *nvim-tree-keybindings*
 
+- type `?` to see the help UI with keybindings
 - move around like in any vim buffer
 - '<CR>' on '..' will cd in the above directory
 - typing '<C-]>' will cd in the directory under the cursor