So, you’ve created your group, and you are about to place an instance of it. You want to nudge it into the corner of the room, but the origin of the group is smack center in the group. So you place, then align, then align again. And you have to do this in each room. Too many clicks.
Wouldn’t it be great if you could move the origin of your group? Wouldn’t this be a bizarre article if you couldn’t?
So, to “slide” the origin, selec the group. You’ll see a half compass with X and Y on it. Just click and drag the “center” grip and move it to the new origin. That’s it. Your group has been updated and any new instance of that group you place will use that origin point.