To avoid the mouse in Noteworthy:

1. type the x on your QWERTY keyboard
2. turn on capslock
3. select the font. (I use Bold.)
4. type the chord, using the shift if necessary to get a small 'm' for minor chords.
5. use right arrow to get to next note
6. use Ctrl+right arrow to shoot to beginning of next measure.

The next time you hit the x, it will remember the font.