@slowsmile and @BetterRed
@slowsmile is right in saying "I doubt if Thasaidon would want the smaller default font sizes in the plugin window ". I do not know what code the writer of 'Tag Mechanic" used but the text his plugin displays is miniscule. I have to use a Loupe to read it. Fortunately I use Tag Mechanic so rarely it is not an issue.
I have Sigil and most of Windows set up so the text on screen is large enough to read comfortably but still have to use the loupe occasionally.
Thank you both for your digging and the info. I will follow this up and tell you how I get on.
