standing desk

Can owners of the SD or XDR comment on how well the height-adjustable stand or pro stand work for switching from sitting to standing? That is, if I'm teaching online, and want to stand up, will these expensive Apple stands give me the height change that I need, without any need for a special...

Is there a desk-mounted monitor arm/stand that specifically only goes up and down? I have a standing desk and every time I switch from sitting to standing position, I readjust my monitor height, but really dislike how free-floating arms can easily jerk the monitor off-axis. I want a sturdy...