dunno what these tmux settings are but ok

.tmux.conf

@@ -1,5 +1,10 @@
+# always indicate the terminal supports 256 colors
+set -g default-terminal "screen-256color"
+
+# set the default leader to ctrl-A instead of ctrl-B
 unbind-key C-b
 set -g prefix 'C-a'
+
 bind-key a send-prefix
 
 unbind ^A
@@ -7,3 +12,5 @@ bind ^A select-pane -t :.+
 
 bind-key C-Tab next-window
 bind-key C-S-Tab previous-window
+
+set-option -g mouse on