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+## Configuring `:FZF` command
+
+If you set up Vim plugin for fzf, `:FZF` command will become available. The following variables are used to configure its behavior.
+
+- `g:fzf_action`
+- `g:fzf_height`
+- `g:fzf_launcher`
+
+### Key bindings
+
+```vim
+" ctrl-[a-z], alt-[a-z], f[1-4], or any single character
+let g:fzf_action = {
+  \ 'ctrl-m': 'e',
+  \ 'ctrl-t': 'tabedit',
+  \ 'alt-j':  'botright split',
+  \ 'alt-k':  'topleft split',
+  \ 'alt-h':  'vertical topleft split',
+  \ 'alt-l':  'vertical botright split' }
+```
+
+### Window size
+
+If you're on a tmux session or using Neovim, `:FZF` will launch fzf in a
+split-window whose height can be adjusted with `g:fzf_height` (default:
+'40%'). However, the bang version (`:FZF!`) will always start in fullscreen.
+
+### GVim
+
+In GVim, you need an external terminal emulator to start fzf with. `xterm`
+command is used by default, but you can customize it with `g:fzf_launcher`.
+
+```vim
+" This is the default. %s is replaced with fzf command
+let g:fzf_launcher = 'xterm -e bash -ic %s'
+
+" Use urxvt instead
+let g:fzf_launcher = 'urxvt -geometry 120x30 -e sh -c %s'
+```
+
+If you're running MacVim on OSX, I recommend you to use iTerm2 as the
+launcher. Refer to the [this wiki page][macvim-iterm2] to see how to set up.
+
+[macvim-iterm2]: https://github.com/junegunn/fzf/wiki/On-MacVim-with-iTerm2
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