Small portable computers (laptops, notebooks, netbooks) have fewer keys than larger desktop keyboards, but most come with a special function key, the Fn key, which when used in combination with other keys, like the Shift key, give those keys multiple purposes.
In some of the newer laptops/notebooks, the Fn key is used primarily to activate special laptop functions. These functions share other keys on the keyboard, typically the Function keys. They're marked by special icons, and these icons are color coded to match the Fn key.
THERE IS NO STANDARD LIST FOR THESE FN KEY COMBINATIONS - But many laptops do use Fn key combinations to do the following – so when you find the combination that works create your own “reference list”:
Fn +UP ARROW increases the brightness of the screen (decreasing battery life)
Fn +DOWN ARROW decreases the brightness of the screen (increasing battery life, but also increasing how much you need to squint to read the screen).
Fn +ESC suspends your computer, switching it to a mode where the hard drive and screen are disabled in order to save battery power. (Usually closing the screen accomplishes the same task, but sometimes you want to leave the screen open.)
Fn +F2 toggles your wireless on and off. (Practice it a few times so you can recognize how the icons in the system tray appear, so you’ll know to switch it back on if you ever disable it by accident.) If you’re on a plane or in a hospital, you should disable your wireless receiver. Or suppose you’re riding in a train or car and you know there’s no wireless signal, you’ll increase battery performance if you disable the wireless receiver.
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