If a slice has more than one recording — like a backing track, or a separate camera angle — you can toggle between them by tapping the “Recordings” menu in the control bar. On a computer, the menu looks like this:
On mobile, the menu is behind this icon:
What’s the “Synthetic” recording?
That’s how you activate synthetic playback. See here for more details.
I don’t see the “Recordings” menu. Why not?
We only show the menu if the slice has at least one recording (beyond default “Synthetic” playback). If you’ve just created a slice and haven’t uploaded a recording yet, then your slice will only use synthetic playback and you won’t see this menu.