I've been through all of the controls, but I don't see anything that would allow creating a new page. I have a group of related drawings that I'd like to put in a single package.
My current Plan B is to create a presentation in Google Slides, but the drawing tools are pretty weak there.
Best Answer
Google drawings are "single page", like a canvas.
You can insert drawings in documents, sheets, slides, Google Sites pages and web pages.
References
Paint and create charts and diagrams with Google Drawings - Docs editors Help