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4.7.2 Control ID
When using the video wall or preview function, use the virtual keyboard or key module to control
the corresponding channel signal on wall or preview the corresponding channel video, you need to
configure the corresponding channel control ID on the decoder first. For details, see the
corresponding decoder instruction manual.
Preview the signal channel of the directly connected device with the virtual keyboard or key module.
On the device management page, click the drop-down arrow on the left of the device name to
obtain the signal.