We’ll now create our sources in the Live Mixer.
In the Live Mixer, Edit tab, Sources section, click on the 
to add a source.
Select the source and rename it CAMERA 1.
In the Editor panel set the Input to Live and select a source in the second drop-down menu that appears.
In the Edit tab, right click on the source and select Duplicate
Name the second source CAMERA 2 and select the second live source in the Input field.
Repeat the process two more times to add the remaining two sources to your Mixer.
Notice that for each source you can adjust a wide variety of parameters : colorimetry, crop, border, soft-edges, etc.
You can also save these adjustments into Presets to make it easier to apply the same set of parameters to multiple sources.
You can also use a live feed as a source and pass it to different Mixer Engines to apply different parameter presets to it.
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