Signature in Mail

[lexicaller]

I wonder whether one can make the signature optional -- to select if she/he wants it or not on per-message basis?

 

[jasnw]

It's easy enough to turn off a signature for each message as wanted. Just select 'None' from the drop-down list labeled 'Signature' on the From line (right side of the message frame). If you want to default to none and select the signature only when you want it, you can do that in Mail Preferences on the Signatures pane. Select the account, and then select 'None' in 'Choose Signature'. Then select the signature you want from the Signature drop-down list mentioned earlier.