The lighting sphere shows all of the possible surface angles and how the lights illuminate them. The light indicators on the sphere show the current positions of all of the light sources.
The Display slider beneath the sphere controls the brightness of the sphere, so that it's easier to see light positions. It does not affect the lights themselves. The Show Light Icons check box lets you show or hide the light indicators on the sphere.
To change a light's angle
1 Choose Canvas menu > Surface Lighting.
2 In the Surface Lighting dialog box, drag a light indicator on the sphere.
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