HIKVISION DS-6900UDI User Manual page 49

Step 3 Edit the video wall name, and the number of screens in row and column.
Step 4 Click Add to finish video wall adding.
 Up to 5 video walls can be added to the client software.
 The total number of display windows of the video wall is 16 × 20.
 The range of the row number is between 1 and 16, and column number between 1 and
20.
Step 5 Click and drag the output channels from the left-side list to the display window on the right.
Audio and Video Decoder  User Manual
Figure 5-8 Add Video Wall
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DS-6900UDI Decoder User Manual