Draw and stamp on a canvas with no edge. Zoom in or out as far as you want and everything stays exactly where you left it.
Pinch with two fingers or use the toolbar buttons to zoom. Hold a zoom button to keep zooming on its own, and drop stamps or draw with the pen while it runs. There is no limit to how far in or out you can go, so anything placed here has room to be as tiny or as enormous as you like.