Hi all. I am trying to compose a scene with walk designer, but I cannot seem to add another layer that overrides the walk layer - I want one of the arms of my character to stay in the same pose through the animation. I've tried deleting keyframes in the animation palette, adding keyframes to the timeline, selecting layers... but the results keep getting worse lol.

I should know how to do this by now, but, well. Any help would be appreciated.