How to user the Outlook Quick Access Bar

You can control which buttons (or icons) appear on the quick access bar, and even in what order they appear.

Choose More > Navigation Options.
In the Navigation Options dialog box, do the following:
1. To change the number of buttons or icons that appear on the bar, increase or decrease the default setting of 4 for Maximum number of visible items.
2. To view icons instead of names, select the Compact Navigation check box.
3. To rearrange how buttons or icons are listed, select an item in the Display in this order box, and then select Move Up or Move Down.
Choose OK.
Tip: If you don't like the changes you made, or just want to start over, select Reset.