Too Many Parts Causing Parts To Be Cut Off Of The Page!

I'm arranging a pre-game show for my high school and I need to have all the instruments on the score. When I put in the names of the instruments, it shows me most of them on my score, but C Tuba and all 3 drum parts are cut off. It is really important that you help me with this!

Here is a picture to show you were it cuts off (right after Euphonium, there should be 4 other parts):
http://i198.photobucket.com/albums/aa293/bradjoe96/Untitled-9.jpg

If I click and drag in a random spot below the score I'll even see the names of the parts, but I can't see/edit the music inside their staves. And drum parts are kind of... important.