The aspect ratio is the ratio of the width of the crop rectangle to its height.
No Fixed Aspect Ratio Fixed Aspect Ratio of:
Drag the cropping region or one of its handles to modify it, click the image outside of the region to remove it, or drag across the image to create a new one.
You can optionally specify a fixed width, height, or width and height. The cropped image will scale proportionaly.
Width: pixels Height: pixels