Apparently it depends on the monitor. Some support "vertical" or "portrait" mode. Just need to see if an affordable one does, but I'm looking at a description of one now (Unify y) that seems to list for ~ $240.
On Amazon: https://www.amazon.com/UPERFECT-Portable...r=8-4&th=1
And here's a ViewSonic:
https://www.amazon.com/ViewSonic-Portabl...hdGY&psc=1
On Amazon: https://www.amazon.com/UPERFECT-Portable...r=8-4&th=1
And here's a ViewSonic:
https://www.amazon.com/ViewSonic-Portabl...hdGY&psc=1
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Gary H. Merrill
Gary H. Merrill