Under the DM reference entry for 'HUD / screen objects' there is a typo where it should say 'right' but instead says 'rigth'.

(Specifically in the following paragraph)
The screen_loc var can be set to a value like "1,1" (the southwest tile of the screen), "4,NORTH" (fourth tile from the west, along the north side of the screen), "SOUTHEAST", and so on. Pixel offsets for screen objects can be set using a colon followed by the pixel position. That is, "1:8,2:-8" means the object will be on the left-hand side of the screen, one tile up from the bottom, and then shifted 8 pixels to the rigth and 8 down.