Rotate
Allows you to configure the following on the [Sub Tool Detail] palette when using the [Rotate] sub tool.
(1) Step of angle
When turned on, allows you to configure the angle by which the object will rotate each time. Click the icon on the right edge to select an angle from the list.
(2) Level off by double-click
When turned on, double clicking the canvas after a rotation reverts to the original angle (0 degrees).