For some reason, when I use a tripod, a LOT of my photos are tilted by a few degrees. It's probably because I'm leaning over to use the tripod instead of squatting down. If I could get gridlines to appear on the viewfinder, I'd be all set. Any way to do this?

http://www.bhphotovideo.com/c/product/402202-REG/Canon_0829B001_Ee_D_Grid_type_Focusing_Screen.html -- 'Women and cats will do as they please and men and dogs should relax and get used to the idea.' -- Robert A. Heinlein