HIKVISION DS-6900UDI User Manual page 62

Step 5 Right click on the window and select Screen Control to remotely control the signal source.
The RSC server supports the screen control for 1-channel video output only.
Step 6 You can use the toolbar on the window's upper right corner to realize the operations for
image, video, PPT and remark.
Audio and Video Decoder  User Manual
Figure 5-26 Link RSC to Video Wall
Figure 5-27 Right-click Menu
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DS-6900UDI Decoder User Manual