Move all questions to the FAQ page.

F.A.Q..md

@@ -4,7 +4,7 @@ Press `<C-W>w`.
 
 Also you can switch between windows faster by their direction:
 
-```
+```vim
 " Switch between different windows by their direction`
 noremap <C-j> <C-w>j
 noremap <C-k> <C-w>k
@@ -41,3 +41,9 @@ If you are using vim-plug, you'll also need to add these lines to avoid crashes
 ```vim
 let g:plug_window = 'noautocmd vertical topleft new'
 ```
+
+## How do I show hidden files?
+You can use `I` to toggle the display of dot files (also call hidden files). To display them by default when you start NERDTree, add this line to your .vimrc :
+```vim
+let NERDTreeShowHidden=1
+```