Ctrl+dto jump half the screen down.Ctrl+uto go half the screen up.Ctrl+fto go one whole screen up.Ctrl+bto go one whole screen backward.Hgoes to the top of the window.Mgoes to the middle of the window.Lgoes to the last line of the window.ztwill bring the position of the cursor to the top of the screen.zbwil bring the position of the cursor to the bottom of the screen.zzwill bring the position of the cursor to the middle of the screen.
You can add repeaters to alter the position of the cursor. For example, you could use 3H to go to the third line of the window. You could also use 3L to go to the third last line of the window.