Apple pencil: select part of drawing, copy, paste into another drawing?
I am using an iPad app with Apple Pencil 2 to make drawings. The app uses the same user interface for drawing as the Notes app. I can use (what I will call, in the absence of any user documentation that I can find) the select tool to select part of a drawing. Then, I have been sometimes successful in bringing forth a pop-up that provides edit commands including "Copy," but I haven't learned how to consistently do that. Then in another drawing -- another Note, say -- I was once successful in bringing forth a pop-up that provided a Paste command, but I likewise don't know how to do that other than by thrashing around and hoping to get lucky.
iPad Pro 12.9-inch, 3rd Gen, Wi-Fi