Zoom Zoom In Move up to the next closest zoom level, making the canvas appear larger.
Zoom Out Move down to the next farthest zoom level, making the canvas appear smaller.
Zoom to Actual Size Move to 100% zoom, so that the canvas appears as large as it actually is according to the canvas units.
Zoom to Selection Zoom to a level and position that fills the view with the currently selected objects.
Fit in Window Zoom to a level and position that make every object on the canvas visible.
Keep Fit in Window This is like automatically selecting the Fit in Window command every time you change something on the canvas. As you work, the view will zoom and move to make sure everything remains visible.
Proof Setup Use this submenu to select a printing or proofing device and its currently assigned profile. The default proofing profile is the Mac OS X default proof profile (usually "Generic CMYK Profile"), but you can use the profile of any printing or proofing device available on your system.
Proof Colors Turn on soft proofing, using the device selected in the Proof Setup submenu. This adds an extra step to the display path for images and colors. First each color is converted from the appropriate one of the three document profiles to the proofing profile, then from the proofing profile to the display profile. This theoretically lets you see on screen what your printed output will look like, since it duplicates the printing path in Mac OS X. This does greatly depend upon the quality of the color profile of your printer, though. For many consumer ink jets, for instance, the printer profile claims that it can reproduce any color (as a way to avoid ColorSync and substitute their own color enhancement in the printer driver). For these printers, soft proofing may not visibly change anything.