Question about changing drawings quicker

I have a character that I pulled from a different scene. I pulled him because he has assets and poses I can use for the current scene I’m working on.

Now he has a ton of keyframes that I can clear. Which I do.

Unfortunately, he also has a ton of drawing positions which I want to all be applied to a single drawing position.

The manual way is to select individually each body part and adjust the drawing back to the one I wanted… Is there a quicker way of doing this?

Two ways.
Or you delete all the frames but the first, and just extend the first frames again to the desired length. In this way, you don’t have to delete the keyframes first.
Or you select all frames per layer, and select the desired drawing. The other drawings stay in the layer element.