Add Enabling Vi Mode as a tmux til.

README.md

@@ -212,6 +212,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Adjusting Window Pane Size](tmux/adjusting-window-pane-size.md)
 - [Create A Named tmux Session](tmux/create-a-named-tmux-session.md)
 - [Cycle Through Layouts](tmux/cycle-through-layouts.md)
+- [Enabling Vi Mode](tmux/enabling-vi-mode.md)
 - [Jumping Between Sessions](tmux/jumping-between-sessions.md)
 - [List All Key Bindings](tmux/list-all-key-bindings.md)
 - [Organizing Windows](tmux/organizing-windows.md)

tmux/enabling-vi-mode.md

@@ -0,0 +1,13 @@
+# Enabling Vi Mode
+
+If you'd like some vim-like bindings in tmux, you can turn on vi mode. To do
+so, add the following line to your `.tmux.conf` file:
+
+```
+setw -g mode-keys vi
+```
+
+With this added and tmux re-sourced, you'll now have a variety of vi-like
+bindings. For instance, when in tmux's copy mode, you can now use `v` to
+begin making a visual selection and `y` to yank that selection into tmux's
+copy buffer.