To get set up a signature on your SI e-mail if you use the Gmail web site to view and read your e-mail, click the small gear in the upper right corner of the main Gmail page, then choose Settings:
In the edit box, type in what you’d like displayed at the bottom of your e-mail messages… I’ve enclosed some text here that you can copy and paste, then edit to match your information.
St. Ignatius College Preparatory
2001 37th Avenue
San Francisco, CA 94116
415.731.7500 ext. YourExtensionHere
The checkbox under the edit box puts your signature above any quoted text that you might be responding to… good idea to check it so that your signature is not lost at the very bottom of a long thread of e-mails.
Once you’ve got it looking the way you’d like, scroll down again to the very bottom of the Settings page and click the “Save Changes” button to enable the new signature.