How to align view exactly normal to a plane?

[artmaker]

I am hoping that this is simple but I can’t find an answer.

How can the view be aligned exactly normal to a surface?

Cntl-click on a transpose line doesn’t do what I need.

Thanks!

Attachments

[artmaker]

OR, as a workaround, is there a way to precisely rotate camera in the SCREEN axis only?

If I use this method https://www.youtube.com/watch?v=GBxIkb19X5M (clicking on the transpose line’s white circle)
then rotating the camera in the screen axis, that would work for most cases.

I may be missing something simple.
Thank you