In the Rearrange Commands dialog box, select either the Menu Bar or Toolbar option. To do so, choose Tools | Customize, click the Commands tab, and click Rearrange Commands. You can rearrange the commands on the Menu Bar or a toolbar, making selection a bit more efficient. Most of us use a few commands a lot, and seldom, if ever, use the rest. Note: This information is also available as a PDF download. Here are some of the various ways you can tailor Outlook to suit your working style. Fortunately, command bars are easy to configure and create in any Office application, including Outlook.
In addition, you can add custom toolbars to automate specialized or repetitive tasks. Only one Menu Bar is allowed, but you can customize both it and the built-in toolbars. Outlook comes with two types of built-in command bar objects, the Menu Bar and toolbars.