Slants an image into a parallelogram as a portion of the starting width and/or height. Image and Video Manager shifts the bottom edge and/or the right edge by a distance that you specify as a multiplier of the width/height. Image and Video Manager adds transparent areas around the sheared image as needed.
If you add the IMQuery transformation to a policy, use the im variable, and select Shear, you can use a query string to adjust the slant of any image using this policy. See Syntax and Examples for the syntax for the query string parameter.