Click View > Toolbars > Customize.
The Customize dialog box displays.
On the Commands tab (Customize dialog box), select the category that contains the command to add.
Drag the command button from the Commands display area to the toolbar.
If the toolbar is not displayed, select the Toolbars tab, and then select toolbar in the Toolbars list.
To return a toolbar to its original settings, click View > Toolbars > Customize. Select the toolbar in the Toolbars list, and then click Reset.