Autozoom

The autozoom function zooms the images so that the fill upp the entire screen even if their aspect ratio is different from the display.

For example, if the image has a wider aspect ratio than the screen (usually 16:9), it will add two black bars on top and bottom to preserve the original image ratio:

However in some cases it is better to enable the autozoom so that the images cover the entire screen, even if that implies cutting some sides of the screen: