Portrait or landscape - if your use is dominated by looking at the screen and/or situations where it can't set it down (to use the KB), then the iPad is better.
Assuming the software you need supports iPad, etc.
Assuming the software you need supports iPad, etc.
https://support.apple.com/guide/mac-help/rotate-the-image-on...
https://discussions.apple.com/thread/255072447?sortBy=rank
FWIW, it's easier to rotate the view in something like Acrobat, and then you don't have issues w/ the cursor direction.
Edit: Just tried rotation in the built in MacOS Preview app, (Command+R or Command+L) and works really well. You do have to set the View to Single Page, and rotate each page separately (it does remember which pages were rotated), but other than that it's great.