title: Vim NERDTree re-size vsplit
body: <p>I am using the NERDTree plugin for Vim. When using the <code>s: open vsplit</code> command, is it possible to resize the windows so that the file is taking up a larger portion of the screen than the directory tree?</p>
  
  <p>[<strong>EDIT 1</strong>]</p>
  
  <p>I have attached a screeshot of my split view using NERDTree:
  <img src="https://i.stack.imgur.com/p0NX2.png" alt="NERDTree Screenshot"></p>
  
  <p>I have installed NERDTree to ~/.vim</p>
  
  <p>[<strong>EDIT 2</strong>]</p>
  
  <p>I do not appear to have ~/.vimrc. I have included a screenshot of /etc/vim/.vimrc</p>
  
  <p><img src="https://i.stack.imgur.com/7FXjg.png" alt="/etc/vim/.vimrc"></p>