Application Studio, Create new Slideout Panel

I thought there was a way to create new/custom slideout panels in app studio

Here even is a video that shows how…

but when I create a child page, and look at the page types it shows this:


“SldingPanel” page type is missing…

Are you doing this off the parent page?

Excellent, my brain said do it from the page where I intended to invoke it from, problem solved, thx