one thing I thought of after that last post was to maybe I could cut two 'overmats' to the exact dimensions of each postcard (assuming each is pretty square) and sandwich them with the bevels reversed so the postcard is cradled in a little crevice, and all the real-estate is visible. I don't know if I'm up to the task, though, of cutting such exact mats with my little hand-held mat cutter and modest experience at mat cutting.