NEC WT615 User Manual page 72

Mute: This controls the mute function of the projector.
Picture On ....... Mutes the video.
Picture Off ....... Cancels the video muting.
Sound On ........ Mutes the audio.
Sound Off ........ Cancels the audio muting.
OSD On .......... Mutes the on-screen display.
OSD Off .......... Cancels the muting of the on-screen display.
All On .............. Mutes each of the video, audio, and on-screen display functions.
All Off .............. Cancels the muting of each of the video, audio, and on-screen display functions.
Projector Status: This displays the condition of the projector.
Refresh ....................... Updates the display of the following conditions.
Remaining Lamp Time ... Displays the remaining life of the lamp as a percentage.
Projector Usage .......... Displays how many hours the projector has been used.
Lamp Hour Meter ........ Displays how many hours the lamp has been used.
Error Status ................. Displays the status of errors occurring within the projector.
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4. Convenient Features