Resolved Display rotation for multiple displays?

[elliottcable]

I've just added a new display to my setup; and I'm trying to use my previous two displays vertically.

Unfortunately, any time I select one of my three displays, and tell it to "Rotate" in System Preferences … any previously-rotated displays reset to their horizontal rendering. I can't, no matter what I do, seem to set *two* of my three displays to be simultaneously rotated to the vertical.

Is anybody using a setup with *dual* vertical displays, in macOS? (I'm on macOS Catalina, FWIW.)
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(Complicating the situation, they're all extremely-high-resolution, and connected to an eGPU: 2x 5k, vertical, and an 8k, horizontal; all powered by a Sonnet eGPU box hosting a AMD WX 9100. I'd like to know if macOS supports this *at all*, though, before I start blaming the eGPU weirdness? Y'know?)

 

[elliottcable]

For anybody else having this problem, I found a couple of solutions outside of macOS itself.

In particular, this little $1 utility, "Rotate It", on the macOS App Store, did the trick. For whatever reason, when I use *it* to change my display's rotation, they *stay rotated.* Go figure.