Zoom to *visible* extents in presentation mode

When in presentation mode, I'd like mockups to zoom to the *visible* extents instead of the extents of the entire mockup, which may have some elements turned off...

Explanation:

When I create screen designs in mockups, I tend to scatter design-related "notes" around the edges of the layout (using the "sticky note" UI element). When in presentation mode, I generally hide those notes (via the "show markup" item). When the notes are hidden, I'd like the resulting mockup to be zoomed as large as possible on the screen. Otherwise, during the presentation, some screens are much smaller than others, due to the hidden notes.

Thanks for your consideration.

Jeff Godfrey