Custom Overlay Texture
This leftmost thumbnail defines an image that will be overlaid on the recorded movie.
Custom Overlay Mask
This rightmost thumbnail defines a mask that will be used to define the areas of the movie frame the image defined by Custom Overlay Texture will be overlaid on.
LR Pos
Controls the left-to-right positioning of the overlay on the movie screen. Takes a value from 0 to 1, and controls the distance from the left edge of the screen (0 is left, 1 is right). The overlay will always be fully displayed within the screen area; these values control the position of the overlay when the overlay is smaller than the screen.
TD Pos
Controls the top-to-bottom positioning of the overlay on the movie screen. Takes a value from 0 to 1, and controls the distance from the top edge of the screen (0 is top, 1 is bottom). The overlay will always be fully displayed within the screen area; these values control the position of the overlay when the overlay is smaller than the screen.
Opacity
Controls the opacity of the overlay image.
Reference Guide > Movie > Overlay Image