If you’ve logged onto your Instagram account over the past day or two, you’ll likely have noticed that your profile has shifted from the classic 1:1 grid to 4:5 portrait-orientation rectangles. That ...

A computer monitor that is taller than it is wide. Most portrait monitors are actually landscape monitors that can be swiveled into a portrait orientation. See landscape monitor and portrait.

But if you’re not writing the next great American novel and aren’t willing to commit to portrait mode, don’t — build an auto-rotating monitor to switch your aspect ratio on the fly.