You can navigate through the menus with the left and right mouse button located at the bottom of the panel, just below the standby button. Press the menu button again to exit the menus Standby will turn off the display and the audio. It will display a blank screen for 15 minutes and will turn off the lamp after 15 minutes. Press standby again to get your image back. If it has been in standby mode for more than 15 minutes, it will take about 30 seconds to get the lamp back on.
Volume controls are self-explanatory.