====== Brightness Panel Plugin ======
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Xfce Power Manger version 0.8.3.1 includes one panel plugin for LCD brightness control (possible other plugins might be added for future releases). The usage of the brightness plugin is simple; just add the plugin to the panel same way as the one used to add any other plugin; then click on the plugin; a slider will pop up that you move/scroll on it to change the brightness level of your screen. Of course the plugin will not work on a system with no back light panel.