I've always had trouble merging layers in Painter like I can do easily in PShop. I know you need to group the layers you want to "merge", then collapse the group, but often the "collapse" option is grayed out (unavailable) for the group I want to collapse. I think this may be because different layers within the group use different composite methods (e.g. one is "default" and one is a gel layer). A quick test recreates this problem:
-Make two new layers above the canvas
-Select the group and access the Layers palette - the "collapse" option is grayed out
This one stupid thing causes me to have to quit Painter and open Photoshop a lot when doind adjustments!
Is there anything I can do to get around this?