Is this your first Canon camera? Not all manu options appear in all shooting mode setting on the top dial. The settings that do not apply to currently set shooting mode do not appear in that shooting mode.
Set the Camera to one of the Creative Shooting modes: P, Tv, Av, or M. Use P mode, because that is the best mode to use to learn about using the camera. Selecting Viewfinder display options will be in one of the Yellow Wrench menus.