I tried selecting the button in the customize ribbon dialog and picked Macro from the drop-down followed by clicking Browse.
It defaults to the Training folder.
Go to Solution.
Not that I'm aware of.
command tips shows the macro name. you could then search for that name... not good but...
Review the appropriate xml file for your custom theme containing the button to see the full macro path.
Themes are stored under “%APPDATA%\Unigraphics Solutions\Solid Edge\Version 108\Customization”
Your tip @MattJohnsonPAC took me quite close.
But I expect Solid Edge to provide a simple and elegant way to achieve this.
Good hack Dave. Anything that works