Up to zoom in and down to zoom out. Click to drag. Left and right to walk. TO COPY: Copy the costumes "Small", "Big", and "Super Big", make two variables called "original costume" and "original size", then copy the custom blocks.
I know @griffpatch_tutor already made this (https://scratch.mit.edu/projects/12651889/), but it was broken, so I fixed it! THE ZOOM IS BROKEN NOW BECAUSE SCRATCH GLITCHES (but if you drag the size custom block out of the palette and enter in a value <10 or >535, it works)!!! There is a size limit of 5% - 54,000%, but there isn't a position limit.