Infinte Page / Extra Space for notes when editing a PDF

I'd LOVE to see this! Like, I use the vertical orientation when I take notes / edit a PDF and I think what would really elevate the App would be if there was the option to not only add pages below my last one but sidewise to every other page es well.

Like right now you can do this:

Page
Page
Page
Page
(swipe to add new page)

And I really need the feature to add like "note pages" next to ever page like

Main Page (swipe to add extra page for notes)
Main Page ("-")
Main Page ("_")
Main Page ("-")
(new Main Page)

Please please add this, it would make the app perfect, really!