Is there any way to group multiple objects together so that they can be all selected together, moved together, rotated together, etc., and would this have anything to do with the lock command which I can't find any documentation for?
> and would this have anything to do with the lock command
> which I can't find any documentation for?
No, locking is different - locking an object makes it so the object is visible on the screen but cannot be selected (unlike hiding which makes the object non-visible).
It's a way to remove objects from being targeted by selection but still keep them around either as visual or snapping references.