How do you use your dual screen setup?

I currently have a dual screen setup at home. A larger 4K monitor and a smaller 2560. I have the 4K directly in front of me and the other as the secondary monitor to the side.

I do most of my work on the 4K monitor, but when coding, I usually put the IDE on the secondary monitor and then have the shell, web console, and web browser with the app running on the 4K screen.

Having looked around offices in the past, this seems to be in the minority.

How do you use your dual monitors?

Does anyone use their bigger screen as the secondary? The reason I ask is because I want to convert to a sit/stand setup, but to do so I'd have to put the smaller monitor on the riser stand, because only the larger one can connect to the monitor arm.

Thanks!