You can add or remove all of the buttons on the toolbars in the Browser and the Viewer.
To add or remove a button on the toolbar:
Right-click anywhere on the toolbar and select Customize.
Select an icon and do one of the following:
Click Add, and click Move Up or Move Down to position the icon.
Click Remove.
Click Close.
Note:
When there are too many icons for the viewable area of the
toolbar, a chevron appears. Click
the Chevron to expand the toolbar.