I'm anti-DM screen, actually. I keep my the map and encounter key in a 3-ring binder in my lap, and I roll all of my dice out in the open. So my "DM Screen" isn't really a screen, it's a clear plastic slip-liner that sits on the table next to me, with two sheets of 8.5x11 paper in it. On one side are the random encounter tables and weather tables I need for the current evening, and the marching order/AC/passive perception of the party. On the other side are the rules for movement, conditions, and actions/bonus actions.
Nowadays, with the pandemic and social distancing in effect, we play over Roll20 so technically everything is on my screen whenever I need it. But I still "roll all of my dice out in the open" by toggling off the Whisper feature on my dice rolls.