I am using the "Instant Alpha" feature in preview to mask out selections and paste them into other applications. When I paste a Alpha mask into say, PS CS5 it comes in with a white back round. Is there a way to have the mask come in with a transparent back round? I find using the previews instant alpha feature far superior to using the masking tools in PS CS 3-5. Previews "Instant Alpha" is Much more accurate and requires less steps needed to get a superior key.
Actually I found it, you save as a PNG and check Alpha, then it will import into PS as transparent but thanks for the quick reply! I also tried to cut n paste with the PS feature set as transparent back round on new document and it still came in with a white back round FYI.