Controls the opacity of the big SteeringWheels.
| Type: | Integer |
| Saved in: | Registry |
| Initial value: | 50 |
Valid values are from 25 to 90 percent. When set to 90, the big wheels appear almost fully opaque against the drawing window and obscure the view of the objects under the wheel. When set to less than 90, the big wheels appear to fade into the drawing window, which results in the objects under the wheel to appear less obscured.