If a link type has a link action in it stored in this child tag of the Code><link> tag. For example, here the link type "custom-made" has an action:
<linkType name="custom-made" visible="1" showLabel="1" required="0" colorString="#000000" style="0" arrowType="0" > <onLink > $Color(destination)="bright green";</onLink> </linkType>See also—notes linking to here: