You were set this net as yellow, when it cover to multilayer pad, it will looks like this.

Bob, Can you post the url to the trimmer so we can identify it in the library? Is it a user contributed PCB Footprint?

Also, suggest you switch to Chrome or Firefox. Edge and IE are unsupported.

Okay, I only use Edge for posting to the forum.  I am using EasyEDA 6.2.24 on Windows for design editing. It is a user contributed library.  I don't know how to get the URL for you, but if you search for PV36W you will find it.  Owner Tommyca.  I tried a different PV36W but have the same problem.  I cannot find net color attribute anywhere on PCB designer.  All three pads appear to be identical.  The schematic has colors, but they brown and I don't know how that would transfer to PCB anyway. Thanks -- Bob

So I added another chip and Trimmer to my circuit, and this one is not green.  Very strange.  I tried removing the first trimmer and then reinstalling it, but it is persistently green.  Like my project has an infection or something.  Ugh.

I can't see any problem with the PV36W footprint. Are you sure you have not accidentally put this track on an unintended layer? Check the Design Manager for unfinished nets (a white cross on a red background). Have you put a Not Connected symbol on pin 1 or 2 of the trimmer in the schematic and then routed over the not connected pad on the PCB? Your project is private so only you can see it. If you can share it with me (or just make it public) then I might be able to spot something.

Thanks Andy!  The track is on the top layer, there are no unfinished nets, and no not connect flags on trimmer.  It seems happy despite the green color. I’d love it if you can take a look. [https://easyeda.com/rbroders/batteryvoltagehalver](https://easyeda.com/rbroders/batteryvoltagehalver) —Bob

As Support stated above, you have (I guess accidentally) defined the net U2_4 to have a different colour to the default in the PCB: 

Thanks for posting the pic showing how to set net colors.  I **never** would have found it! —Bob