Adding an overlay to OBS
Build an overlay in the editor, set one as Main, then add the single OBS link as a Browser source in OBS. It always shows whichever overlay is Main — so you can swap what's on screen without touching OBS. Overlays are composited by OBS on your machine, so they never affect your copy-first relay.
See Overlays → Setup & help in your dashboard for the step-by-step guide.