This tool allow to open/close the cover and light the flat calibrator.
The calibrator section is not visible if the device include only a cover without the calibrator light.
Similarly a flat panel not attached to a cover do not show the cover section.

The light are green when the telescope is ready for imaging with the cover open and light off.
Click the Open / Close button to change the cover status.

When the cover is closed it is possible to check Light and set the desired brightness.
Some devices do not change the brightness instantly, Wait the light change to yellow to indicate the ready status.

Uncheck Light to stop the light and keep the cover closed, or click Open to stop the light and open the cover.