Split the screen in two
I am doing a lot of maths (I am a theoretical physicist). For this it is essential to be able to check the previous pages of THE SAME DOCUMENT. I suggest a feature that would enable splitting the screen into two for the same document.
Sean Jones commented
This has already been planned http://feedback.goodnotesapp.com/forums/191274-goodnotes-ideas/suggestions/6553377-implement-a-splitscreen-option