IC Realtime 4/8/16/32 Channel 1U PoE Network Video Recorder - Manual (Page 28)

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Listening Operation
At the PC-end, speak via the speaker or the pickup, and then you can get the audio from the
earphone or sound box at the device-end. See Figure 2-10.
Figure 2-10
2.5 Mouse Operation
Please refer to the following sheet for mouse operation instruction.
When you have selected one menu item, left click mouse to view menu
content.
Modify checkbox or motion detection status.
Click combo box to pop up dropdown list Left click
mouse
In input box, you can select input methods. Left click the corresponding button
on the panel you can input numeral/English character (small/capitalized). Here
← stands for backspace button. ＿ stands for space button.
In English input mode: _stands for input a backspace icon and ← stands for
deleting the previous character.
In numeral input mode: _ stands for clear and ← stands for deleting the
previous numeral.
Implement special control operation such as double click one item in the file list
to playback the video.
Double left
click mouse
In multiple-window mode, double left click one channel to view in full-window.
Double left click current video again to go back to previous multiple-window
mode.