I created a DM Cheat Sheet for myself. I wanted a Timer Dice tracker and a HP tracker for my bad guys. Some quick reference guides for names and places. And if I really needed to look something up I had a page number. I also added the Mapless Maze Generator. I cannot remember who had it on a character sheet but I borrowed the distance gauge too.
That blank spot, on my personal version I have several Core 2 ICRPG monsters that are only available in the book or PDF. You will need to add your own. I don’t really care to use a screen but if you do I suppose you could rearrange this or use it to create your own.