Seating Chart Changes

So after we got all our RSVPs in we created a seating chart and waited about a week before ordering it (foam poster board from VistaPrint). About two weeks ago we had some changes that didn't affect the number of tables just who was at the tables/ how many people at a given table. So we ordered a new one that comes today. The wedding is in two weeks and we have received lots of changed answers to Nos in a way that reduces the number of tables and number of chairs that we are paying to have upgraded, but not enough time to order a new poster. Any fun creative ways to put up the one we have and let guests know that they are at a different table? I don't really want to write on the poster with something permanent for picture purposes. Thanks in advance!!