It was pretty easy to adjust the Arduino code to display what I wanted - except for the blank line that became a line of "-".
As mentioned in the DCC-EX documentation - here - I had to change the source code for that release. It is not in a config file, so at the next release, I will lose those changes and will have to do them again:
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| CommandStation-EX.ino |
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| CommandDistributor.cpp |
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| WifiInterface.cpp |
Next step is to thing about how to fix the OLED display on the fascia of the test bench.