diff --git a/vim.md b/vim.md
index 6c89e52..8f75368 100644
--- a/vim.md
+++ b/vim.md
@@ -77,4 +77,9 @@ filetype plugin indent on    " required
 " Put your non-Plugin stuff after this line
 ```
 
-after a large apt update, something got messed up with characters and colors, simply doing `syntax on` fixed the problem
\ No newline at end of file
+after a large apt update, something got messed up with characters and colors, simply doing `syntax on` fixed the problem
+
+when using NERDtree:
+* open `o`
+* open with a horizontal split `i`
+* open with a vertical split `s`
\ No newline at end of file