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The crescent key is called a sleep key.
The Sleep key is used to put the computer into ACPI state G1 Sleeping from ACPI state G0 Working.
The Advanced Configuration and Power Interface (ACPI) specification is an open industry standard first released in December 1996 developed by HP, Intel, Microsoft, Phoenix and Toshiba that defines common interfaces for hardware recognition, motherboard and device configuration and power management. According to its specification, "ACPI is the key element in Operating System-directed configuration and Power Management (OSPM)".
try wikipedia.org to find out about g1 nd g0
hope this helped
That's the Sleep button, and you may not have it configured to do anything. If you'd like to change that, go into Start\Settings\Control Panel\Power Options and click on the Advanced Tab. From there you can select several options for the Sleep button.
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The crescent key is for the computer to go night night!
Look under power settings in control panel this could be a key that can be reprogrammed. Usually out of the box it will but the computer into sleep mode.
For some key boarda the "Fn" key and crescent both need to be depressed.
Shaking the mouse or hitting space bar will wake up the computer.
The blue keys serve as a secondary function for your volume control, monitor controls and pause play fast forward rewind (in media mode). In order to use the blue keys that are numbered from F1 to F12, you must depress and hold the Fn key that is located at the bottom left side of the keyboard. Here is a way to test it: Open up any file that plays sound for longer than 1 minute (60 seconds). While this file is playing, hold down the Fn key and simultaneously press F8 and listen to the volume get louder or Fn and F7 together and listen to the sound get lower. The picture of the crescent moon F1 will adjust the brightness of your screen. F2 will magnify your screen. F3 will take you to your email. F4 will take you to your internet home page. F6 will mute the volume. F7 will lower the volume. F8 will raise the volume. F9 will rewind your video playing. F10 will stop the video. F11 will pause or play the video. F12 will fast forward the video.
There is a + key (same key as = key) on the keyboard. Try looking in the upper right area of the keyboard to the left of the backspace key. Press the shift button and the + button to type the + symbol.
Please let me know if it helps.
To get character: £ then press down and release the Num Lock key (To make num lock on) located in the upper left part of the number pad on the right side of your keyboard so that the LED above is lit and release that key. Then hold down the Alt key and type 156 using that number pad. you will get pound sign
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Usually it means "go to sleep" (the crescent is intended to be a moon and mean "night"). It won't work unless you have the appropriate energy saving profile activated in the system, though (Control Panel -> Energy Saving)
there must be an function key on your keyboard.....and several symbols on other keys ...with same colour may be...if you press function(fn)key + the key on which symbol is made the same task is done....for example a key on your keyboard has a crescent moon type symbol...if you use it with function key..your lappy will hibernate...some other keys may be for brigthness of your screen ,increasing and decreasing sound etc..