After you’ve adjusted your chair, you can do some helpful basic adjustments to your monitor.
Some key pointers:
1) Make sure your monitor is in front of you, and not to the side. This helps you avoid constant twisting of your neck. If you use two monitors equally, place them close to one another and in front of you. If you use one more than the other, place the one you use most in front of you and place the second monitor to the side. You can change which side now and then.
2) Raise your monitor so that the top of your screen is approximately at eye level. You want to have your natural gaze fall in the top 25% of the screen.
3) If your monitor is too bright or not bright enough, find out how to adjust it and do that. You’ll spare yourself eye strain.
4) If you have glare from a lamp or window on your monitor, pull the curtain or add a blind or move the lamp. You could also try moving your workstation if that is possible.