It would be great if there was a mode wherein all the text that you highlight (using a specific tool designated for this mode), would be hidden (the text disappears but you see a blank line in its place). When you click on the blank line again, the word will reappear (then clicking another time will make the word disappear) -- basically it's becomes a mini flash card/ fill in the blank option!

Also, this would only apply when you turn the mode on. Once its turned off the file is back to normal/original form and you won't see which words were "highlighted" during study mode.

This could be extremely useful for active recall when studying, which I think many goodnotes users would appreciate! Also this isn't yet being done by many of goodnotes top competitors so it would really set them apart <3