How to set "Client" mode for image viewing on iPad/iPhone?

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With the new iUSBCam app v1.2: https://itunes.apple.com/us/app/iusbcam/id675508754?mt=8

The first icon with camera image is the "Master mode" and the second icon with tablet image is the "Client mode"

Tap the second icon, the Client mode window will be on iPad/iPhone for image viewing only.