© Copyright Qvis ®. All documentation rights reserved. 73Notes: After you go to the mark management interface, system needs to pause the current playback.System resumes playback after you exit mark management interface. If the mark file you want to playback has been removed, system begins playback from thefirst file in the list.4.8.3 Picture Playbacka) From Main menu->Search, or on the preview interface right click mouse, you can go toFigure 4-61.b) At the top right pane, you can check the box to select picture and then select playbackinterval.c) Please refer to chapter 4.8.2 to select picture you want to view.4.9 Backup4.9.1 File BackupIn this interface, you can back up the recorded file to the USB device.a) Connect the USB burner, USB device or portable HDD, etc.. to the device.b) From Main menu->Backup, you can go to the Backup interface. See Figure 4-66Figure 4-66c) Select backup device and then set channel, file start time and end time.d) Click add button, system begins the search. All matched files are listed below. Systemautomatically calculates the capacity needed and remained. See Figure 4-67.