To turn on Rich Text Email Compser, and send emails with different fonts, colors, sizes, etc:
1. Click on the Preferences menu located in the upper right hand of your account. The preferences window will open
2. Click General Settings under the Email heading
3. Under the Compose Email heading, select the Rich Text Composer button.
4. Click Save located in the top left corner of the preferences window
NOTE: You may revert back to Plain Text Composer at any time by selecting Plain Text Composer and saving your settings