Select independent mail signature font size

GrampaJack wrote:

My email signature font (13 pt Helvetica) has always been smaller than the body font (18 pt Helvetica), but after I added a second signature option, the email body font and signature font appear the same size – even though the "Always match my default message" box is UNchecked.

How can I set the body font to 18 pt while maintaining a signature font of 13 pt? I'm using a MacBook Pro with a Sonoma 14.3.1 operating system. Admittedly, I am not technically inclined, so please be as specific as possible.

See what is here—

Create and use email signatures in Mail on Mac - Apple Support

All you can do is experiment a bit, make some changes and compare your results.

You may have more control using HTML signature—

https://matt.coneybeare.me/how-to-make-an-html-signature-in-apple-mail-for-macos-sonoma-14/