Techniques for allowing a gaming machine to exercise control over a picture-in-picture device (PIP mixer). A gaming machine includes a display device, a master game controller, the PIP mixer, and a PIP control interface. The master gaming controller is configured to execute a wager game, send a first video signal for the wager game to the PIP mixer, and send control instructions for controlling a display of one or more PIP windows to the PIP mixer via the PIP control interface. The PIP mixer receives the first video signal and a second video signal from an external source. The PIP mixer is configured to create a composite video image that includes display data of first video signal and the second video signal in PIP windows based on the control instructions. The composite video image is displayed on the display device.