To rotate 3D surface plot lighting
main topics     example     see also 

1    Activate the window containing the 3d surface plot.

2    Click the lighting rotation buttons (circled below) on the 3D Graph Tools toolbar to rotate the lights a few degrees about the indicated axis. Click and hold to rotate more quickly. (To show or hide this toolbar, choose Tools > Toolbars > 3D Graph Tools.)

While the lights are rotating, their position and color are indicated by large dots, as illustrated below. If the lights are not visible when rotating, try zooming out by clicking . To reset lights to their original positions, press .