This is not 100% directly related I admit but close enough, if the handwriting has to happen in the handwriting section, I don't see how to move backwards and forwards in bars directly from the handwriting section, I have to go up into the score to select the bar. If I'm writing out a long melody line, it is annoying. Making the area larger might help but alternatively an option to move forwards/backwards bars from that handwriting section could help.
Otherwise as the other comment says, allow a direct edit into the score.