Alright, thanks a lot 🙂
Yeah, you can import just one png (could be a model sheet or a background or something else) – or you can shift-select multiple png’s (like a numbered sequence of video or rendered 3D animation, etc, for reference use).
When you import png’s Animation Paper automatically creates a reference layer for the images. It is not possible to draw directly on a reference layer, but you can add a new normal layer on top and do animation, clean up or tracing or whatever on top of the reference layer that way.
Reference layers do allow you to use all the usual timing functionality – like add clones, copy/paste, slide originals, etc.
I hope this helps you!