User manual HP ENVY 13-1100EA

[. . . ] HP ENVY 13 User Guide © Copyright 2009 Hewlett-Packard Development Company, L. P. registered trademarks of Microsoft Corporation. Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. SD Logo is a trademark of its proprietor. [. . . ] Whenever possible, place bright light sources behind the webcam and out of the picture area. Adjusting webcam properties You can adjust webcam properties using the Properties dialog box, which is accessible from various programs that use the integrated camera, usually from a configuration, settings, or properties menu: Brightness--Controls the amount of light that is incorporated into the image. A higher brightness setting creates a brighter image; a lower brightness setting creates a darker image. Contrast--Controls the difference between lighter and darker areas on the image. A higher contrast setting intensifies the image; a lower contrast setting maintains more of the original information's dynamic range but leads to a flatter image. Hue--Controls the aspect of color that distinguishes it from another color (what makes a color red, green, or blue). Hue is distinct from saturation, which measures the intensity of the hue. Saturation--Controls the strength of color in the final image. A higher saturation setting creates a bolder image; a lower saturation setting creates a more subtle image. Sharpness--Controls the definition of edges in an image. A higher sharpness setting creates a more defined image; a lower sharpness setting creates a softer image. Gamma--Controls the contrast affecting the mid-level grays or midtones of an image. Adjusting the gamma of an image allows you to change the brightness values of the middle range of gray tones without dramatically altering the shadows and highlights. A lower gamma setting makes grays look black, and makes dark colors even darker. Backlight Comp--Compensates in cases where a subject with a large amount of background light would otherwise be obscured by blooming or silhouetting. Webcam 37 For more information about using the webcam, select Start > Help and Support. 38 Chapter 5 Multimedia 6 Power management Setting power devices Using power-saving states The computer has two power-saving states enabled at the factory: Sleep and Hibernation. When Sleep is initiated, the power light blinks and the screen clears. Your work is saved to memory, letting you exit Sleep faster than exiting Hibernation. If the computer is in the Sleep state for an extended period or if the battery reaches a critical battery level while in the Sleep state, the computer initiates Hibernation. When Hibernation is initiated, your work is saved to a hibernation file on the hard drive and the computer turns off. CAUTION: To prevent possible audio and video degradation, loss of audio or video playback functionality, or loss of information, do not initiate Sleep or Hibernation while reading from or writing to a disc or an external media card. NOTE: You cannot initiate any type of networking connection or perform any computer functions while the computer is in the Sleep state or in Hibernation. Initiating and exiting Sleep The system is set at the factory to initiate Sleep after 15 minutes of inactivity when running on battery power and 30 minutes of inactivity when running on external power. Power settings and timeouts can be changed using Power Options in Windows® Control Panel. With the computer on, you can initiate Sleep in any of the following ways: Briefly press the power button. [. . . ] Follow the on-screen instructions. Performing a recovery NOTE: You can recover only files that you have previously backed up. HP recommends that you use HP Recovery Manager to create a set of recovery discs (entire drive backup) as soon as you set up your computer. Recovery Manager software allows you to repair or restore the system if you experience system failure or instability. Recovery Manager works from recovery discs or from a dedicated recovery partition (select models only) on the hard drive. [. . . ]