Setting Page Layouts

I see in the options where to set default layouts for various types of pages. The “Page” layout says “(is_page) Default page layout – If a page has a set layout, it will override this.” Where can I set that per page? When I edit the page, the only options I see for “Template” are “Default” or “child Menu.”

Sorry for the barrage. I”m just excited about this theme and digging all around!