SightReadingFactory.com allows you to optionally annotate your music. To do this:
- Generate some music that you'd like to annotate.
- Click the gear icon on the top right of the toolbar
- Check the 'Use Annotations' box
- Use the 'Annotations' dropdown to select the annotation you'd like to use.
- Generate some new music for the annotation to appear.
- You can use the 'a' hotkey to toggle the annotations on and off.