How to add images to the drawing substitution window

Hi, I am new to ToonBoom Animate Pro. I want to change some images on an object I am moving to the right using the drawing substitution method however in the drawing substitution window I only see one frame containing all of the layers combined as opposed to seeing each individual limb of my character, I suppose this is because each image is on its own layer as opposed to being on one layer. Any tips on how I can add images to the substitution window will be greatly appreciated.



the drawing sub window only shows the drawings on that layer. There is no other way to use this i know of.

Ok, thanks for your response I ended up doing some other tedious method.