Overlay

The Overlay feature allows you to display an Input on top of the currently displayed Input.

An Overlay can be activated by clicking the Overlay button from the Input Bar.

Alpha Channel and Colour Keys

If the Input contains an alpha channel. (for example a PNG image with a transparent background) then it will be taken into account when displaying the overlay.

A Colour Key can also be set for an Input from the Input Settings. When set, the selected colour will display as transparent.