title: IntelliJ: Specify per-project tab size
body: <p>Is there a way to set the tab size in IntelliJ for a single file only, or at most for a single project?</p>
  
  <p>I use a tab size of 3 for all my code; however, I'm collaborating on a project with an author who prefers a tab size of 4.  Is there a way to set the tab size to 4 for only those files that are part of this project?</p>