Icon arrangement
How do I rearrange the icons on my desktop from left to right by name?
MacBook Air, OS X El Capitan (10.11)
If you removed the "from left to right" from your question, you could control-click on the desktop, and then choose "Clean Up By ... Name" from the dropdown.
That would arrange the icons in name order, but they would tend to appear from top to bottom rather than left to right.