How to capture a screenshot in Plasma Mobile?

Power + volume down doesn’t invoke the full-screen shot. I expected it to, considering that (per Phosh uses GNOME Shell’s underlying implementation to do so.

Spectacle isn’t installed by default, but would a default binding exist which can be invoked on a mobile device, and can one be set with these buttons (if not)?

There’s at least a shortcut in the Quick Settings area.