Click View tab Navigate panel SteeringWheels flyout click one of the available SteeringWheels.
Right-click on the wheel and click SteeringWheel
Settings.
In the SteeringWheels Settings dialog
box, under Big Wheels or Mini Wheels, slide the Wheel Opacity slider
left or right.
Sliding the slider to
the left increases the transparency of the wheel, while sliding
the slider to the right decreases the transparency of the wheel
making it more opaque.