What is skewing ?
More information :
Skewing refers to changing the position of two sides in parallel fashion, while leaving the adjacent sides alone. A vertical or horizontal skew applied to a rectangle object causes its corners to become non-perpendicular (they are no longer at 90 degrees).
The Skew Transformation also gives you the chance to apply both vertical and horizontal skew independently or simultaneously by entering degree measures, in turn, transforming the object either vertically or horizontally.
Skew with a positive value :
Positive values cause anti-clockwise skews.
Skew with a negative value :
Negative values cause clockwise skews.