Collapse the Ribbon to get more space on screen

Outlook 365 2016 2013 2010
When you need as much space as possible on screen to view a message, you can collapse (or minimize) the Ribbon to only its labels by double-clicking the label of the tab you're currently using.

Or press Ctrl+F1:

Minimize Ribbon in Outlook 2007

While the Ribbon is minimized, you can click a tab to display the Ribbon so that you can issue a command. Once you've issued the command, the Ribbon minimizes itself again.

Display Minimized Ribbon in Outlook 2007

Double-click the current tab again or press Ctrl+F1 to expand the Ribbon back to its normal size when you want to have it displayed again.

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