title: Split single view horizontally in Sublime
body: <p>I'm using Sublime Text 3.</p>
  
  <p>I want to edit a single file, but split it horizontally so I can edit two parts of the document (similar to MS Word).</p>
  
  <p>Under view>layout>rows, it shows a file horizontally. However- it only allows a new file (not the same file).</p>
  
  <p>Is this possible?</p>