Hiding/showing objects
Any object on a page can be hidden, including notes, rests, symbols, clefs, bar lines, even entire staves.
This can be useful in the following situations:
Printing scales
If you want to create scale examples, enter the notes and hide time signatures, bar lines and other unwanted objects.
Graphic notation
By hiding bar lines, you can produce graphic notation.
Hiding notes meant for playback only
If you have recorded your music, you may have added glissandos, falls, etc. that sound fine but result in a lot of unnecessary notes. You probably want to hide those notes and insert the suitable symbols instead.