How to hide printable area guides?

I’m calling them printable area guides because they seem to change when I use Page Setup to change the type of paper I would erstwhile be using. They’re distracting and I want them to go away. They are black lines that look like guides, but I can’t grab them. As mentioned, they can be made to go further to the edge of the page by adjusting the paper size in Page Setup. They go completely away if the paper size is somewhat larger than the canvas size, but then I have problems with my other canvases - the canvases are different sizes, you see.

Does anyone know what these “guides” are called? How do I hide them?

As usual, solved it myself just after posting. Those are page breaks and are easily hidden by going “View - Page Breaks”.