I downloaded the new XCode 11 Beta this afternoon, found this Apple Tutorial, figured I'd start to take a peek at it. Made the sample app, as instructed. The "Canvas" isn't showing. I've clicked Editor - Editor & Canvas (that is checked). The left side of the screen looks just like the tutorial, but there is no "preview" iphone sort of sumultor. Clicked on all the little buttons, but have found nothing. Anyone get it to work?
https://developer.apple.com/tutorials/swiftui/creating-and-combining-views
To preview and interact with views from the canvas in Xcode, ensure your Mac is running macOS 10.15 beta.
https://developer.apple.com/tutorials/swiftui/creating-and-combining-views