How do I change the text and link colors of my email signature ? Luc C. February 22, 2015 18:10 Under the styling tab, we have options for setting the font style, size and colors. Related articles How do I request adding additional social media icon options? How do I cancel my service? How do I change the layout/theme of my signature? How do I add an email signature in Outlook 2016 for Mac? How do I change the social media icons and sizes? Comments 0 comments Please sign in to leave a comment.