EDIT: I found it myself: On a German keyboard you need to press the key Ü or the + key as they correspond to the US keys [ and ]!
I’m using a Mac and I just can’t figure out what key combination to hit to move an object to back or to front!?
ON Mac “option + 6” is the ]-key. But this changes nothing on the whiteboard.
BTW - I’m using a German keybaord layout, so the cahracters [ and ] are not available directly on the keyboard (we need more space for umlauts).