No matter the image size(1680x900) the slider saves the image to be 1220 x 660. This produces a large gap at the top and some at the bottom. Why is the full screen slider not showing the actual image size? Perhaps someone can tell me an ideal slider image size that will allow the slider to resize the images properly for a responsive display. New sizes and positions are not getting saved, instead the size remains as shown  in this screen shot.

Any ideas?