 CONT: In early seasons there are wood boards in Monicas apartment  that go from the floor to the ceiling. In later seasons there are  only wood boards by the fridge. In fact, certain directors for the  show enjoyed putting their own mark on the episodes they directed.  In the case of the visible wooden beam furthest "downstage" it was  known as the mark of Kevin Bright (qv), and would appear every  time he directed an episode.