Click two points on a View window to define a circle. The radius of the circle defines how far the deformation is effective. Distance to the center of the circle is calculated for each point to get a deformation parameter. The control curve is then evaluated by the deformation parameter to get the amount of deformation. Click on a View Window to define the point you want to rotate about the rotation center. Move the mouse until desired rotation is achieved and click to accept the tool.
The Rotate3D tool has the following options: