The Ken Burns effect allows you to create panning and zooming animations to make the background image like a video.
With Zoom option you can set the direction of the effect. It can be In or Out.
The Scale option will increase or decrease the size of the slide background image in the Ken Burns effect. The default value is 1, the value 2 will double the image, while 0.5 results half the size. Negative values will flip the image.
The amount of the Rotate (if any) in degrees used in the Ken Burns effect. Negative values are allowed for counterclockwise rotation.