How do I dim my laptop screen?

Believe it or not but on mine if you unplug it the personal from an AC power sources and just let it run on the artillery it will mellow. Now otherwise than that it would turn on the type of laptop that your using.

Check your owners guide and also you might analyse HPs website. Basically look high the laptops epitome number also you might metal able to get the owners manual there if you don't have it in PDF format or ask in there tech help section.