The ability to open two different notebooks side by side, will most likely be available in the next version of GoodNotes. Thanks for your patience!
We’re happy to inform you that we have started working on a much better document management system. Tags and folders will likely be part of it.Aron Teutsch commented
In the Application you have just 2 hierarchic folders, but more hierarchic folders would be nice, so that you can organic your files better.
Im using this Application as student, and it's so useful, cloud system is working perfect, but i have so many files on it, already organized in folders, that i need more hierarchic folders, to organize better the mass of files :-)
PS: and of course thx a lot for the great App