Quote Originally Posted by ddt0725
."Could not use the color replacement tool because it does not work with alpha channels". What the heck does this mean and why am I getting this message?

Alpha channels are basically masks that store transparency information. If you're working with a TIFF image, you can have alpha channels, but JPGs don't support them. If the workflow in the book called for you to make a selection mask (with the wand or lasso, for example), and then save that selection (Select > Save Selection), it was saved as an alpha channel. Click the Channels tab, and you'll see your alpha channel(s) along with the RGB color channels.


IIRC, you recently switched from Elements to CS - you probably haven't run across channels before because Elements does not have a channel mixer.