Usage
Click the spot angle button to activate it. Then keep the middle mouse button pressed and move the mouse horizontally. The angle of the currently active spotlight will be changed until you press the left mouse button to confirm or the right mouse button to cancel.
Comments
The angle of the currently active spotlight may also be changed accurately by using the angle input box. Click the angle input box and type in the new value for the angle of the spotlight. The units used for the angle input box are in degrees.
This button will be available only when the currently active light source is a spot light.
