I created a 3-staff score with Wizard. I then added 128 measures. Because I needed to see my score in a certain way, I hid staffs when they were empty, using the "staff" dropdown. Entering music went very smoothly until I reached the point where there were only 2 staves showing. After that, all of the remaining systems showed only 2 staves. Why did the score revert to showing only 2 staves? I don't want to add another staff, because really, the score already has 3 staves and it will be very confusing and time-consuming. Any ideas? Thanks. I tried deleting the remaining measures and then adding more, but only 2 staves showed again in the empty measures.