Right-click in any unused area inside the palette. Choose Customize Commands from the menu.
Drag a command tool either from the list in the Customize User Interface dialog box or from a currently displayed toolbar onto the palette.
The horizontal line indicates the location of the tool.
On the tool palette, right-click the tool and choose Properties.
In the Tool Properties dialog box, enter a name and description.
Under Command, in the Command String box, enter a string of commands or customized commands, such as an AutoLISP routine, ObjectARX command, a VBA macro, or a script.