[. . . ] Make sure to install the software to enjoy all the enhanced functions. [. . . ] Make sure to install the software to enjoy all the enhanced functions. Four steps of light intensity allow you to choose the right amount of backlight. Logitech, the Logitech logo, and other Logitech marks are owned by Logitech and may be registered. 2 Internet zone Instantly launch your Web applications: FN+F1 Launches default web browser FN+F2 Launches default e-mail application FN+F3 Launches default search engine FN+F4 Launches default VoIP application 3 Convenience zone Directly access convenient features, such as: FN+F5 Quickly switches between open applications FN+F6 Displays on-screen gadgets FN+F7 Displays on-screen calculator FN+F8 Ejects CD 4 Media zone Easily control your music or video playback: FN+F9 Launches default media application FN+F10 Previous track FN+F11 Play/pause FN+F12 Next track 5 Software settings In software settings, you can easily reassign an enhanced F-key (F1 to F8) to another function. Hold down for three seconds both the FN key and the F-key you want to reassign in order to launch software settings. [. . . ] 2 Internet zone Instantly launch your Web applications: FN+F1 Launches default web browser FN+F2 Launches default e-mail application FN+F3 Launches default search engine FN+F4 Launches default VoIP application 3 Convenience zone Directly access convenient features, such as: FN+F5 Quickly switches between open applications FN+F6 Displays on-screen gadgets FN+F7 Displays on-screen calculator FN+F8 Ejects CD 4 Media zone Easily control your music or video playback: FN+F9 Launches default media application FN+F10 Previous track FN+F11 Play/pause FN+F12 Next track 5 Software settings In software settings, you can easily reassign an enhanced F-key (F1 to F8) to another function. [. . . ]