Datavideo SE-4000, Инструкция по эксплуатации

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3. Enable Key Tie and on the right, select a background image.
Below are available sources of the background image:

Input 1 – 8

Off
Note: You will not be able to use the keyer button once key tie is enabled. Use the input
button that is assigned the background image to open the key tie image.
4. After key tie is configured, to open the key tie image, simply press the corresponding input
button of the background image selected at Step 3. In this example, input 1 is selected as
the background so press button 1 of either the Preview or Program row to open the key
tie image on the respective views.