How to set up your new email signature if you are using the Haystack App:
Scroll down to the 'Signature' section (in the 'general' tab)
Edit your firstname.lastname@tstc.edu email address
‘Paste’ the signature in the signature editor box (press Ctrl+V in Windows or Command ⌘+V on Mac inside the white box)
In Signature defaults, set your firstname.lastname@tstc.edu email address in all three dropdown boxes and 'Check' the checkbox underneath the signature box (saying 'insert this signature before the quoted text in replies and remove the "--" line that precedes it.')
Scroll down and click ‘Save changes’ to apply.
How to set up your email signature if you are not using the Haystack App: