Needing to double-tap is an RSI nightmare—should be an option if only for accessibility purposes.

Totally agree.
Please add this option.
One-tap with two-fingers: Undo.
One-tap with three-fingers: Redo.
Most note-taking and art applications offer this option for us so why is it still not available here in Goodnotes which I consider as the best note-taking app?

I use other applications that have the features of single-tap 2 or 3 fingers for undo / redo. It would be REALLY nice if Goodnotes had an option to choose whether to consider single or double-tap choice for the user. Muscle memory goes to heck when I switch between apps. And using the toolbar to select undo/redo is too slow.

Absolutely must have option to choose!

Agree. I cannot understand the thought process behind the implementation. If I need to undo 10 strokes, I have to tap the screen 20 times, instead of just 10. It's maddening, and I just use the undo button instead. Implementing undo-redo with a double-tap is the same to me as not implementing it at all.

It would be nice if the was a toggle option. It could be more deliberate and useful for some the way it is now, for others having a single tap across apps makes everything more efficient.

Another post with the same thing - http://feedback.goodnotes.com/forums/191274-customer-suggestions-for-goodnotes/suggestions/38613820-one-tap-undo-and-redo

Completely agree. This makes switching between good notes and other apps more painful. When I get into the other app, I end up over-undoing. When I return to good notes, I waste a few seconds wondering why undoing isn’t working.

There seems to be some additional rejection of taps when I switch from drawing to tapping, so it typically takes three or four taps for the first undo.

Also, this when drawing a figure, you might have to draw 10 or 20 strokes before knowing if you like the result. I’s much nicer to two-finger tap 20 times than 40.

Please include option to choose between one tap or double tap to undo/redo. I understand using double tap is more deliberate and will result in less false undo/redo instances, but if Procreate and so many other apps haven't had a problem with accidental triggering of undo/redo, it should also be an option for GoodNotes.

I would argue that even if there was an accidental trigger, we can more easily undo/redo in a single tap to revert that change.