Bottom holders for Showcard should be adjustable so that you can insert showcard in top horizontal clamp and rest bottom of card on the holders of legs. They are stationery now so you can't use them.
I bought this for a new work from home job. I was not sure if it was the right size or would work as I needed it to. I found it to be Lighter than expected tougher than I thought and handy. The size worked fine as well.