Where do I set the "global default" for composing mails in HTML or plaintext?

[René J.V. Bertin]

On Sunday April 26 2020 11:48:16 Mathias Homann wrote:

>having two separate signatures per identity, one HTML and one plainext, sounds 
>just as logical, but way more user friendly.

I seem to recall that HTML in an email signature is frowned upon (just like overly long ones, etc) - and not just by those who frown upon email that is not in plain text.

R.