Hey there. Im not sure why you would want to highlight all persons of a group
What i can tell you is that the devs have been working on a small feature where if you select a stand, it highlights all pax for that stand. And a few others like that.
Will it also highlight staff assigned to the stand? It would be a nice feature to see where the staff is (where take their break). This would be nice in designing staff rooms and security gates for staff people to avoid delays.