in staffmail   select  the cog/flower icon for settings and then select “options”

from the menu on the left select “Mail” then “Layout” and “Email signature”

Add the information to your signature and select when you want it used using the checkboxes.

If you want to add links to your signature, click and drag to select the text and select the “more” drop down arrow, then select the link icon

add your link including the https:// bit

don’t forget to Save