A macrobutton is not a physical button - it is a field. It displays as text and you can format it to give it background shading or make it stand out.
Paste the following line of text into your document
MacroButton myMacroName Double click to make it so
Change the myMacroName to the name of YOUR macro
Select all that text and press Ctrl-F9 to convert it to a field. Then press F9 to make it display the result.
Now you have a macrobutton field. Double click that text to run the macro.

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Andrew Lockton
Chrysalis Design, Melbourne Australia