Evolution. Signatures, how to delete?

[HermanAA]

How to delete old signatures ??

Evolution Help only gives this:
The signature editor allows you to create several different signatures
in plain text or in HTML, and to specify which of them will be added to
email you create in the message composer. If you prefer to use an
alternate signature or none at all, you can select it from the mail
composer itself.

Herman in Philippines.