How to use image shape transform tool on Mac?

Here is tutorial of how to change the image shape:

Step 1. Select the "Transform Tool" in the toolbar.:

 

Step 2. Select a mode in the "Option Bar".

There are four selection modes, as follows:

A – Scale.
B – Ratate.
C – Skew.
D – Perspective.

Optional: Set the required parameters in the "Option Bar".

There are three parameters, as follows:

A – Adjust Horizontal Scale.
B – Adjust Vertical Scale.
C – Set Rotation Angle.

Step 3.Select the desired transformation mode.


Here is a simple example of transforming a rectangle into a trapezoid.