Marah Mag

Hi. Is it possible to customize key commands in Paint.NET. I would like to have the Redo function be under Ctrl+Shift+z, as it is in many/most other programs by default. As far as I can tell there is o way to change this from Ctrl-y which is a relatively difficult key combos to type quicklly with one hand, as it involves a very wide stretch. It makes do a a series of undos and redos really slows down workflow. Is there any way around this? Thanks.