How to Edit the HTML Source of a Yahoo Mail Email

Unfortunately, the functionality described here is not currently available at Yahoo Mail. Rich text features are available, but the HTML is not displayed and is not editable. Use the toolbar at the bottom of the Compose screen to alter font size, style, and color, apply stationery templates, adjust the alignment of text, add emoticons, insert links, and apply numbers or bullets to lists. 

If you use Yahoo Mail with Internet Explorer on Windows, you can make easy use of rich formattings like boldface, custom fonts, or graphical smileys. Even if you do, not all of HTML's richness is available, and even if you don't, you can use HTML formatting in Yahoo Mail. How so?

Yahoo Mail lets you enter HTML code in your emails directly. If you know at least some basic HTML coding, this is a nice and flexible way to customize and enrich your emails.

To edit the HTML source of a Yahoo Mail email you are composing:

• Check View HTML Source. If View HTML Source is not available—it is only when the rich text editor is active—check  Allow HTML tags instead.