Right mouse in the tool bar area.
Customize (at the bottom of the list).
Comands tab.
Click Macros (near the bottom of the list).
Drag the smiley face custom button up into your tool bar.
Close the customize box.
Click on the smiley face and assign the macro.
You can change it from a smile too, just get back into
customize and right mouse on any of the buttons and you
can change them.