How do I turn on pagination?

This feature is called Auto Tiling so if you were looking for pagination in the feature find tool that's probably why you couldn't locate it! I am happy to help! If you look on the right side of your canvas you'll see the Page Setting section. Under "Page" you will see options like size format units auto tiling color content scale and fit. You'll want to make sure that the option for auto tiling is turned on. Then you'll be able to diagram away and have pages automatically added when you go over a page :)