Change Posting Signature

Herb,

How do I change my posting signature to avoid confusion with other folks with the same first name? I'm not looking to hide an identity, just differentiate. I tried modifying my first name paranthetically, but the system would not accept that.

Thanks, Pete

I think I'm just going to allow first and last names to show.
I do not have the time to reapprove all the AstroMart usrs again.
Some may choose not to use the Forums if their full name is shown but the alternative is me spending even MORE time on AstroMart.

Thanks
Herb