As you may have noticed, some of the magnification commands are missing from the FrameMaker 11 Zoom menu. I'm a huge fan of Fit Page in Window, but as of version 18.104.22.1680, it's MIA. Here's a quick tutorial on using the keyboard shortcuts to handle all of your magnification needs: "Adobe FrameMaker 11: Missing Zoom Commands" at http://blog.rockymountaintraining.com/?p=2914. I guessing that once you master these shortcuts, you won't care about the menu anymore!
Barb Binder, Adobe Certified Instructor on FrameMaker