First, I'm no professional with PS CS6. Do not have Illustrator. I have this logo, red circle w/white letters and superscript 2. It's going to be printed on light gray fabric. I assume that I need to make transparent canvas and transparent letters (lu) so that it takes the gray color of the fabric and not the white background and letters of my file but when I rasterize type, save and open it again I cannot edit. Also, what's the best save format? Thank you very much for your help!