Resize a picturebox?

Hello everyone! I am working on a simple tool to write on these touch screens they have at school now, so I have been using a picturebox to write in. It does the job very well, but the only issue, so sometimes I would like to minimize the picturebox into a thumbnail, and add a new picturebox so I would essentially have a new "slide". I can resize the used picturebox to a certain size, and stretch it so it looks smaller so I can refer back to it, if need be.

The issue I am wondering about is the number of pictureboxes. If you know about PPoint, you can add a new slide by pressing a button, but is there a way to just add a new picturebox by pressing a button while the prog is running? Or maybe I don't need another picturebox, maybe I just need to have the prog temporarily save the current picture in the picture box, and just blank it when I press a button to add a new slide. What do you think, has anyone done something like that before? I don't want to save the "thumbnailed" picturebox contents, but would like to refer back to them while the lesson is going on.

Thanks!