Button to return to normal speed；

displayed frame by frame，press【Play】button to return to normal speed；

【FWD】Button：Play fast forward through the playback video，at the speed of 2x, 4x times，press【Play】

【REV】Button：Play fast backward through the playback video，at speed of 2x, 4x times，press【Play】Button

to return to normal speed；

⑤Other function buttons

【POWER/ON】Button：for turning the machine on and off（Standby and start）；

【LOG IN/LOCK】Button：get the operating rights，to type in the password and lock operation；

【PLAYBACK】Button：for reviewing the recordings, log, state of hard drive, information of software edition

and so on；

【QUAD】Button：For switching display between quad, dual views and single picture；Order of Display:

Channel1→Channel 2→Channel 3→Channel 4→Dual views (Channel 1-Channel 2) →Dual

views (Channel3-Channel 4) →Built-in quad→ Channel 1

【ANALOG】Button：display the brightness, contrast, color and tint, adjusting its parameters using the 【+】,

【-】buttons（This operation can only be performed when you are in single picture mode

and the channel can not be recording at the time）；

【EXIT】Button：Exit button， Exit from the operating menu, return to the last selected menu.

【CF】Button：Enter into the standby menu for recording material, copy the files on the hard drive to the backup port.

【LANGUAGE】Button：Enter into “language selection” menu to setup the language.

【NET】Button：Standby button；

【RECORD】Button：Start manual recording in single, dual or quad mode.

【STOP】 Button：Stop manual recording in single, dual or quad mode.

【SETUP】Button：When logged into the system, press this function button to enter into the menu setting of