Head Light options
Sliders are available to change the intensity of the scene's ambient light and headlight.
The Ambient slider controls the general overall brightness of the scene while the Headlight slider controls the brightness of the light located at the viewpoint.
Note
Changes made in Head Light options will not be visible unless you have selected the Head Light rendering style.
Go to Tools, File Options, Head Light
The Head Light dialog is displayed:
Move the sliders to affect the ambient and head light intensities. You will see the effect your changes have on the scene in the main navigation window, as long as head light is selected as the rendering style.
Click OK to set these options or Cancel to exit the dialog without setting them.