When using the Customer app you must ensure that the iPad running the Customer is on the same Wi-Fi network as the iPad running the Master app.
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Multiple Customer Facing Displays
If you are using multiple Master apps, you must assign one Customer app per Master. To enter the settings of the Customer app, tap on the four corners of the display clockwise, enter your PIN. From there you can select to which Master app you want the Customer app to connect to.
