Dahua DHI-NVD0905DH-4I-4K - Page 52

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Table 4-3 PTZ control parameter description
Parameter Description
Direction control
Control PTZ to turn in eight directions, including up, down, left,
right, top left, bottom left, top right and bottom right.
Step Control PTZ turning speed. 1–8 steps can be set.
Zoom
Click or to adjust zoom.
Focus
Click or to adjust definition.
Iris
Click or to adjust brightness.
PTZ menu
Click
to open PTZ menu of preview interface. Then,

select different functions with direction key, to operate PTZ.
Click to turn off the PTZ menu of preview interface. 
4.3.4.9.2 Virtual LED
Divide a customized area on the video wall, enter any characters, and display them on the screen.
Click . Step 1
The system displays virtual LED interface.
1-channel 4K high definition (H.265) series, 6-channel 4K high definition (H.265, with 4 input
ports) series and 9-channel 4K high definition (h.265, with 4 input ports) series are slightly
different. The actual interface shall prevail.
Open virtual LED Figure 4-32
Click to add virtual LED. Step 2
The system displays Virtual LED interface.