Primary Output
 
 
 

One of the outputs is tagged as being the primary output. Aside from identifying the principal output of a composition, the primary output is most useful in the following workflows:

The first output node that is automatically created with a new composition is the primary output by default. However, in a composition with multiple outputs, any output can be set as the primary output at any time. This can be achieved through a drop-down menu listing the output node names in the Composition tab.

You can also use the Set As Primary right-click option on an output node in the Schematic view.