How To Change Default Font In Gmail

To specify a default typeface, formatting and color for emails you compose in Gmail:

• Make sure Default Text Styling is enabled (see below).
• Follow the Settings link in Gmail.
• Go to the General tab.
   
• Use the Bold, Italic, Font, Size and Text Color buttons under Default text style to specify the desired formatting.
• Click the Remove Text Formatting to reset the font face and color to the default.<
  
• Click Save Changes.

To enable Default Text Styling in Gmail:

• Select Settings in Gmail.
• Go to the Labs tab.
• Make sure Enable is selected for Default Text Styling.
• Click Save Changes.