Changed bindings.

.tmux.conf

@@ -7,10 +7,13 @@ set-window-option -g mode-keys vi
 # remap prefix from 'C-b' to 'C-a'
 unbind C-b
 set-option -g prefix C-a
-bind-key C-a send-prefix
+bind-key a send-prefix
 
 # vim binds for pane navigation
 bind-key h select-pane -L
 bind-key j select-pane -D
 bind-key k select-pane -U
 bind-key l select-pane -R
+
+# last window similar to screen
+bind-key C-a last-window