Right now you can only draw a square/circle of "free" size, that is to say you have to count the exact number of squares as you draw it, which is annoying, especially when the gridlines are hard to see due to the map background. You can automatically generate a square/circle of an exact size using auras, but this requires a token (which you need to place on every map) and the aura size will be larger than what you want as the token itself takes up a 5 ft square. So a 20 ft aura is really 20 ft + 5 ft. A tool that lets you automatically generate a square of 20 ft or whatever size would be EXTREMELY helpful. No more slowly drawing a large square to show the size of a 40 ft diameter spell while slowly counting how many squares you have drawn already.