Don't feel bad. Due to the unique layout of the engine, our bikes are just a little "different" than the rest.
If you've never had one before, how are you to know?
This exact same question came up on Boxerworks not so long ago.
It will be asked again.
The difference between the way you learned it and the way I learned it, is we didn't have computer consoles in every house and on every desk at work, where you can get these things answered for free and with ease.
And no, I don't know how I would go about phrasing that on Google... I tried "bmw footpeg offset" and got nothing that applied on page 1...