How to Setup Custom Gmail Signatures
Email signatures often provide useful contact information for the receiver, but there are instances in which different signatures can be beneficial, such as when choosing between a corporate and a personal quote.  Editing a single instance of a signature is quick and easy, but if you would like to reuse the updated signature regularly using Google’s “Canned Responses” can save you time and effort.  Here’s a simple step-by-step tutorial on what Google calls “Canned Responses.”
Source: DNN Affin inport