Selecting any of the below commands in the 3D view toggles the type of effects which control various aspects of how the 3D view is displayed. If a check mark is present in the menu, then the effect type is used in the 3D view. If this option is not selected, then that type of effect is not used.
View - Effects - Fast Rotate
View - Effects - Wireframe
View - Effects - Perspective
View - Effects - Transparent
View - Effects - Lighting
View - Effects - Fixed Lights
View - Effects - Metal/Brick Colors
View - Effects - All Levels Appear Equal
View - Effects - Auto Scale