- click 'account settings' - if more than one account, highlight the desired account for the postal address on left side - in the box for signature, just type it in. - then, click 'composition&addressing' on left side of screen - click 'Composition' in left side - here you can specify where to place the signature and whether also for forwards or replies.

Thank you David. That's sooo kind of you! I've done it!

You're welcome. Be sure to send an email to yourself and then reply to it to confirm that it either shows/doesn't show as desired and that it shows appropriately if desired.