We're talking about funky polygon shapes here that you may not need on a regular basis, but could be useful at times.

You can create 2 (or more) polygons that are NOT connected and track them as one entity (multipart).

You can also remove areas inside of an existing polygon (like a donut).

To use, 'edit' an existing polygon as before and notice the control screen:

You have an option to 'Add Area' or 'Remove Area'. After clicking one of the options, simply click on the map to perform the action.

Click the checkmark to stop editing and save.