title: How to increase the vertical split window size in Vim
body: <p><code>:vsplit</code> (short form: <code>:vs</code>) split the Vim viewport vertically. <code>:30vs</code> splits the viewport, making the new window 30 characters wide. Once this 30 char window is created, how would one change it's size to 31 or 29?</p>
  
  <p>With horizontal windows <kbd>Ctrl</kbd>-<kbd>W</kbd> <kbd>+</kbd> increases the number of lines by one. What is the equivalent command to increase the columns by one?</p>