This FPV video switch unit does not have an on-screen display (OSD). To use it, simply connect your FPV camera to one of the three input ports (Video 1, Video 2, or Video 3), then choose which output port you want to view (also labeled as Video 1, Video 2, or Video 3). Note that all input and output wires have black and red colorings, but only the yellow wire is used for switching between channels. The switcher will not affect the black and red wires.