Put the monitor at a comfortable height that doesn't make the user tilt their head up to see it or bend their neck down to see it. When you are seated comfortably, a user's eyes should be in line with a point on the screen about 2-3" below the top of the monitor casing (not the screen). Sit back in your chair at an angle of around 100-110 degrees (i.e. slight recline) and hold your right arm out horizontally, your middle finger should almost touch the center of the screen. From that starting position you can then make minor