Assign Parameter Names
1. Select ASSIGN and Dimension.
2. Pick the dimension for the radius of the large hole.
Type in: 'HoleRad' [Enter]
3. Pick the dimension for length of the slot.
Type in: 'SlotLen' [Enter]
4. Pick the dimension for the width of the slot.
Type in: 'SlotWid' [Enter]
5. Press END.