1) Go to your email settings
2) Under the General tab, which is the default tab that should open when you access your Gmail settings, scroll down a little bit until you arrive at the “Default text style” section. Immediately to the right there will be an example of what your default message font style and type will be, set it to whatever you like.
3) Scroll down to the bottom and click Save Changes
Last Updated: 11/12/15