DVR systems DVR31xxH Series - Manual (Page 35)

35
4.3.2.4 Synchronized playback function when playback
During playback process, click numeral key, system can switch to the corresponding channel
video of the same time.
4.3.2.5 Digital zoom
When the system is in full-screen playback mode, drag your mouse in the screen to select a
section and then left click mouse to realize digital zoom. You can right click mouse to exit.
4.3.2.6 File backup and clip
System supports backup operation during search. You can draw a √ before file name
(multiple choices). Then click backup button
If you want to clip a period of file, please playback the original file first. Click the at the
start point (that is your new file beginning point). Drag the file to the end point (that is your
new file end point) and then click the again. Click the backup button to save your current
new file.
4.3.2.7 Slow playback and fast playback
Please refer to the following sheet for slow play and fast playback function.
Button Illustration Remarks
Fast play button 
In playback mode, click this button to
switch between various fast play modes
such as fast play 1,fast play 2 and more. Frame rate may
vary due to
different versions.
Slow play button ►
In playback mode, click this button to
switch between various slow play modes
such as slow play 1 or slow play 2.
Play/Pause ► In slow playback mode, click this button
to switch between play/pause modes.
Previous/next In playback mode, you can click │  and
 to view previous or next video in
current channel.
4.3.2.8 Backward playback and frame by frame playback
Button Illustration Remarks
Backward play:
 in playback
interface. In normal playback mode, left click backward
play button

, system begins backward
playback.
Double click backward play button again,
system goes to pause mode.
When system is in
backward play or
frame by frame
playback mode, you
can click play
button
►
/  to go to
normal playback.
Manual playback
frame by frame. Click pause button in normal playback mode,
you can use
│ and │ to view frame by
frame.
Note:
All the operations here (such as playback speed, channel, time and progress) have
relationship with hardware version. Some series DVRs do not support some functions or
playback speeds.
4.3.3 Calendar
Click calendar icon in Figure 4-12, system pops up a calendar for your reference.