Click Tools menu CustomizeInterface.At the Command prompt, enter
cui.
In
the Customize User Interface editor, Customize tab, in the Command List
pane, click any command to display the Button Image pane (in the upper-right
corner) and the Properties pane (in the lower-right corner).
In
the Properties pane, select the field next to the Small image property. An
Ellipse button will be displayed on the right side of the property.
Click
the Ellipse button next to the property.
In
the Select Image File dialog box, browse to the image file that
you want to use for the command.
Repeat
steps 3 through 6 for the Large image property of the command.