Resizing the stage does not move the artwork, as in Flash. Something that was at the right-hand edge of a wider stage stays where it was drawn and ends up past the edge.
Off: everything merges into one shared pool. On: each new shape is a self-contained object. Same engine, private map.
Open a .fla to import it. XFL only — the binary container that CS4 and earlier wrote has to be converted in Animate first. Whatever cannot be brought across is listed here rather than dropped quietly.
━━ fill boundary ╌╌ stroke centreline