Duplicating Student Work Across Slides

Hello, I’m curious, I’d like to chunk steps of a complicated task (making a function animation). Here’s my question: how can I make a graph that students can add their own images to, then have them advance to a new slide which will preserve the images that students used on their previous slide, then have students advance to another slide which will have all their work (images, edited center for the image) from the previous slide?

You can pull the state of a prior graph as a background, but not as an independent object that can be manipulated (i.e. the state is visible in the graph, but nothing from the prior graph will be in the expression list).