View > Toolbars > Customize > Toolbars > Custom Commands
Allows you to assign a toolbar button icon to a macro. When you select Custom Commands in the Categories box, the Custom Commands box displays a list of available macros.The Custom Button dialog box opens when you drag a macro from the Custom Commands box to the main toolbar.
Buttons
Displays the available icons.
Assign
Specifies the icon for your button and closes the dialog box.
Browse
Opens the Select Bitmap File dialog box, which allows you to look for an icon on your local computer or on the network.