Shortcut Category: Shortcuts for PowerPoint
Shortcut Commands: Zoom In, Zoom Out, Zoom to Fit

Default Shortcut Keys:

Zoom In: Ctrl+Alt+Up
Zoom Out: Ctrl+Alt+Down
Zoom to Fit: Ctrl+Alt+Space

Description:

The Zoom In, Zoom Out and Zoom to Fit are used regularly for fine-tuning placements and dimensions of various shapes. But there is no keyboard shortcut for it that can be used to quickly access those functions. Microsoft Office PowerPoint 2007 included a Ctrl+Mouse Wheel shortcut to Zoom In and Zoom Out. That helps a bit. There is still no shortcut for Zoom to Fit function.

Shortcuts for PowerPoint adds these functions, presets keyboard shortcuts for them and also allows you to modify these keyboard shortcuts in case you don't like the default key combination.

For interactive zoom and pan during the slide showm look at OfficeOne ProTools Zoom.