Supernote is a different mac app as it doesn’t seem to have a menu with the various keystrokes for various functions. That means that I cannot use the standard mac keyboard app-specific tools to redefine keystrokes.
I realized this as I much prefer command-] and command-[ for indent and outdent and not tab and shift-tab. It’s more apple-like and is easier to do on the fly than shift-tab for me.