How do you do this? I try to select the keyframes in my mainline, hit "copy", then open the new empty action and hit paste but pasting isn't available.

In AS9, is it possible to grab animation and make an action? Let's say I've already animated some walk cycle and want to make an action out of it. Is there a way to move the animation by for example copy-pasting the desired bits? How do you achieve this?