I occasionally hear from a user who is disappointed that they accidentally hit the "fill in all pencil clues" button, and doesn't realise that the Undo button will work in that situation. A Toast could make this more obvious (perhaps use the firstFewTimes method).
I occasionally hear from a user who is disappointed that they accidentally hit the "fill in all pencil clues" button, and doesn't realise that the Undo button will work in that situation. A Toast could make this more obvious (perhaps use the firstFewTimes method).