3D - Color

Default settings of transparency, brightness, and light position.

Options tab > Preferences group > Preferences > 3D - Color.  

Transparency/Brightness
Set the values of transparency and brightness at the program start-up.

• Transparent ... Solid (Default: 70%)
  Opacity of parts that are displayed transparent.
• Dull ... Shiny (Default: 50%)
  Brightness of parts that are displayed shaded.

Light (Default: Light at 4/4)
Drag the yellow light spot to set the default light position.