Currently, if the user wishes to modify the grouping of strokes or correct misrecognition errors, they have to choose an option from a menu or use a toolbar at the top of the screen.
Special hot-spots could be placed on the bounding box for each recognised symbol. These could then be touched and the hot-spot would either react by offering a pop up menu of alternatives, thus giving the functionality of the ``modify character'' mode, or dropping into ``modify stroke group'' mode for the next stroke drawn with the pen. However, addition of hot-spots would potentially detract from the minimalist and aesthetic design goal.