QSTD5304 Digital Video Recorder User Manual34LOCK/UNLOCKLock submenu is shown as Fig. 3.43. Its function is to lock or unlock therecord.Fig 3.43 LOCK/UNLOCKUse "Enter" key to change the state. If a record event is locked, it can not bedeleted or covered.3.3.3 InformationPress "INFO" button, and the information will appear on the screen, such asHDD quantity, usable rate of HDD, record mode includingmanual/alarm/motion, etc.3.3.4 Other• In live display mode, if pressing "Up" button, it will display the firstchannel in full screen.• If pressing "Down" button, it will display the second channel in fullscreen.• If pressing "Left" button, it will display the third channel in full screen.• If pressing "Right" button, it will display the fourth channel in full screen.• If pressing "Enter" button, it will display the four-divided channel.• If pressing "Audio" button, it will switch the voice of correspondingchannel in live display mode.