I up this. Sometime I just really wanna keep my screen position locked the way it already is in my ipad settings for other apps. Eg. Youtube is awkward to use if the screen is locked in upright position while books is awkward to be read on ipad used in hoizontal position settings of ipad.

Yes, it's a time-consuming, unproductive task. Please fix it asap.

One of my uses of Good Notes is to grade student work, that is scanned as pdf's, then imported to Good Notes. Needless to say, rotating pages in a 20 page document one page at a time really feels like a waste of time.
Please add this handy little feature to make life easier.
I would even suggest you be able to select either multiple pages within a document, and then rotate pages, but I would also like to see the possibility to select multiple documents, rotating all pages in all of the documents at the same time. That would really be handy.
Thank you.