Eotech holographic sight? How to set a default light setting?

I am curious to know whether or not (and if possible, how?) you can keep the adjusted light setting on your eotech holographic sight. like if I want the setting to stay ready for low light conditions. with my eotech, every time i turn it off and then back on, it resets the light setting back to a regular setting. Is it possible to keep it at MY preferred setting even after I've turned it off? Some way to change the default setting?