Entering or altering memory channels

[G4EFE]

Hi folks - After owning the (tr)uSDX for around a couple years, I now have a little time to have a play.
I've refamiliarized myself with the menu options but I can't see how to enter or alter change the memory channels. It does HAVE memory channels, does it? Or, at least, a 'home' channel for each band?
Can anyone help? Thanks - Martin