I am just posting this, as I was having some trouble figuring out how to do this, and could not find anything out there. So I figured I would post this in case anyone else got into the particle editor and had trouble with the preview area. (Like me, cause likely I am just a noob) Anyways. Left click on the preview image: Rotates the preview Mousewheel Click (Note: Not mouse wheeling up and down, but actual mousewheel down): Drags the particle around Right click on the preview: Zooms in and out by moving the mouse up and down. Hope this helps someone.