title: tmux + powerline, bottom is too big
body: <p>I recently switched from screen to tmux/powerline/tmuxinator<br>
  As shown below, there is a big unused space between the window and status bar.</p>
  
  <p>What could be causing it?</p>
  
  <p><img src="https://i.stack.imgur.com/89eqY.png" alt="enter image description here"></p>
  
  <p>.tmux.conf</p>
  
  <pre><code>set -g prefix C-t
  unbind C-b
  bind C-t send-prefix
  
  set -g status-keys emacs
  setw -g mod-keys emacs
  
  set -g status-position bottom
  
  # status bar
  set-option -g status-utf8 on
  # status bar
  
  
  # windows
  bind-key C-t last-window
  
  # focus on first window#
   select-window -t 0
  
  source ~/.local/lib/python2.7/site-packages/powerline/bindings/tmux/powerline.conf
  </code></pre>
  
  <p>and tmuxinator</p>
  
  <pre><code># ~/.tmuxinator/zibann.yml
  
  name: zibann
  root: ~/Documents/zibann/
  
  # Optional tmux socket
  # socket_name: foo
  
  # Runs before everything. Use it to start daemons etc.
  # pre: sudo /etc/rc.d/mysqld start
  
  # Runs in each window and pane before window/pane specific commands. Useful for setting up interpreter versions.
  # pre_window: rbenv shell 2.0.0-p247
  
  # Pass command line options to tmux. Useful for specifying a different tmux.conf.
  # tmux_options: -f ~/.tmux.mac.conf
  
  # Change the command to call tmux.  This can be used by derivatives/wrappers like byobu.
  # tmux_command: byobu
  
  windows:
    - root: ls -l
    - emacs: workon zibann &amp;&amp; cd momsite &amp;&amp; emacs
    - cmd: workon zibann &amp;&amp; cd momsite
    - ipdb: workon zibann &amp;&amp; cd momsite &amp;&amp; emacs
    - dbshell: workon zibann &amp;&amp; cd momsite &amp;&amp; python manage.py dbshell
    - logs:
        layout: main-vertical
        panes:
          - tail -f momsite/momsite/log/celeryd_error.log
          - tail -f momsite/momsite/log/celerybeat_error.log
          - tail -f momsite/momsite/log/uwsgi_out.log
          - tail -f /var/log/nginx/error.log
    - supervisor: workon zibann &amp;&amp; cd momsite # &amp;&amp; python manage.py supervisor --config-file=momsite/conf/supervisord.conf
  </code></pre>