Aspect Ratio

The Aspect Ratio is the ratio between an images height and its width. For example, an image that is 4 inches wide by 2 inches high is twice as wide as it is high, and has a 2:1 ratio.  When an image is resized, the aspect ratio is maintained so that the image remains in proportion.

To resize an image without maintaining the aspect ratio, right-click on the image. From the right-click menu, open the Resize/Custom Size option and uncheck Keep Aspect Ratio.