I'm trying to merge two images in PS CS5 on a mac. They're the same size and everything, but when I try dragging the image across no new layer gets created. When I create a layer and try dragging that I get a message saying the destination file can't accept it. could anyone help please?
What color mode and bit depth are the images?
For example if the destination image is bitmap, index color or multichannel then you can't have layers.
You might try changing the color mode to RGB Color under Image>Mode.
Other options might be that the receiving doc is in QuickMask Mode or does not have the composite channel selected …