I have a game board made of heavy card stock that doesn't lie flat at the creases, and the sections bow a little. Is there a way to keep it lying flat? Maybe a way to mount it?
The board is from Commands & Colors: Ancients.
I had a similar problem. The board in my case wasn't creased, but it was printed on flimsy card stock. The board was black so I bought a sheet of black foam core from a hobby store (Michaels in my case, but they carry it at Target, Staples, and many others). I sprayed the back of the game board with some spray adhesive and glued it to the foam core board.
You can either cut the foam board to size before gluing or after. I cut it before and it seemed to work okay, although it made lining up the board during gluing pretty critical and difficult. I found a sharp Exacto knife was the best way to cut the board.
You have several options about how to mount it: