Scales picked objects around a rotational point.
Stretch the object rotationally.
Change the number of rotational sections (such as the spokes on a wheel).
When this option is on, the tool prompts you to specify the number of divisions that the model has now, and the number that you want it to have.
For example, for a wheel with eight spokes, you can type in a value of 8, then reduce it to 4.
