Hi @Alfie
You can save chord sets from Section C into the USER folder, so one approach wpould be to find a song you like in Section A, Select All and Add Chords to the Current Pattern. in Section C Then save the pattern(s) to the User folder (see here) for a short tutorial.
Yes:
Click on the Scaler logo
and there are the first two options in the context menu are:
UNDO LAST ACTION and REDO LAST ACTION.
In Section C there are also undo and redo options
