Tab Between Elements

In TahDoodle, it would be nice to be able to hit the tab key and move keyboard focus between the tableView, ‘Add Task’ button, and ‘Delete Task’ button. Anyone have any ideas how to make this work? Right now hitting tab just focuses on the, what looks like, NSScrollView or NSTableView-- It’s hard to tell which element actually gets focus.

I’ve tried searching the Google to no avail. It’s difficult to come up with a query for this. :unamused:

TIA