Gotcha. To each their own, of course
At the desk for that long...if you have a chiropractor (I do, congenital bad back) see if they have a descriptive chart showing the proper resting angles for a person at a desk. I had one but lord knows where it is now. I do know that your arms should generally be 90 degrees at the elbow, the mouse and keyboard should be at armrest level, and you should be able to sit back and still read the screen. Never hunch over or lean one way or another for extended periods. You'll end up cramping something every time. One of the worst sins is typing or mousing with your arms up on the desk. Very bad move. I know now from experience.