Go Tools -> Customise and select the "Commands" Tab. Then choose the "Macros" option in the left hand window. You will see two opions, one with a picture of a smily face and one without. Choose one and click-and-Drag it to the toolbar. Then rightClick it and at the bottom of the list that you will see is an option to "Assign a Macro". Select it and your macros list will pop up. Select your macro and close the "Customise" Window. You can add a picture to your toolbar button, or give it a name etc.