Hi Lynn, it's an indication of the component's terminals on either end of the cable. The Green terminals mean the Part (blue colored circuits) has a symbol(red circuits) applied to it, and they match type (turning green to confirm proper assignment). In this case your blue terminal indications show that you have a part terminal designated, but no symbol representing those terminals in your drawings yet.
Here's the key
Red - symbol added to component, but no part circuits occupy the symbol at those positions
Blue - part added to component, but no symbol circuits occupy the part at those terminals
Green - Symbol AND part have been added and the circuits from symbol and part are the same style
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