prefAdd Disk

Parameters Name, Material..., Path..., Show axes, Position, Angle, Scale are general for all objects. They are considered here.
Group Sizes sets the sizes of object. Group Elements defines a design of object. Parameter Slices influences quality of object display.
disk
Sizes and Elements:
disk1 disk2 disk3 disk4 disk5
Parameters on screen shot Inner radius: 0.20 Sweep angle: 180.00 Start angle: -45.00
Sweep angle: 180.00		 Inner radius: 0.40
Slices: 7