Just as with the Site Title in order to set up the tagline in the Agility Skin 3.2 you go to the typical font styles. Then go down here to site tagline. Again, you can choose the font family, choose the font size, choose an existing color or enter your own color.
You’ve also got the full range of font style options as well as the top and bottom margin. Since the site tagline is not a link there are no link options to set for it.