Measurements Box

Once again my Measurements Box, the one that appears at lower right and gives so much information, has disappeared. When this happened before I found that my window was not maximized; however, I’ve made sure that it is. I’ve also searched here and not found an answer. I went through all the Menu options without finding anything that would bring it back.

I don’t know why it disappeared. I was using SU and discovered it missing when I thought to check a dimension in the box only to find it gone. I tried rebooting my system and restarting SU with no luck.