Radius: Defines the circle radius for arrangement
Start: The Angle on circle where the first object should start
End: The Angle on circle where the last object should end
Axis: Defines the Axis of Circle
Active: If the Angles are Active an given angle will be set to the object rotation.
Align: This option will rotate all fixtures according to the circle angle.
Click this button to arrange.
If this option is active, the arrangement will be done immediately after changing any value.