Hi Semi,
I found this in the Yahoo Mail Help:
How do I write in BOLD, italics or Color, or change font size?
On the Compose page, above the upper-right corner of the compose window, there's a link that either says Rich Text or Plain Text. Click this link to switch back and forth between the two. Since the link is the switch, you'll actually see Plain Text when you're in Rich Text.
In Rich Text, you can change the look of your message in a bunch of different ways. Again, since the link is there to switch from one mode to the other, if you see Plain Text, that means you're already in Rich Text! If you see Rich Text, click it.
The Rich Text toolbar appears above the Compose window.
Spell check
Going from left to right, the first button is the 'abc' spell-check button. Click it anytime to check your spelling starting at the beginning of your email. When you're finished, click Close.
Font and Size
Font: The Font button has two F’s on it. Click it to view other Font choices and select another Font.
Size: Click the button with two A’s on it to choose the size of type you want. Browse the menu and click the size you want.
Bold, Italics and Underline
B is for Bold, I is for Italics, and U is for Underline. Emphasize your point! :o)
To use these formatting tools, either click a button and start typing, or, select a block of text (or one word), and then click a button to format the text.
color
Text Color: Click the "T" button to see a palette of many colors. Select the text color you want, and start typing. Or, select a block of text (or one word), and then click the button to apply the color.
Background color: Want to give your text a background color? Either click the highlighter color you want and then start typing, or, select the text to which you'd like to add a background, then press this button to apply the highlighting color.
Emoticons
Add emotional oomph to what you say by selecting from the list of graphical emoticons.
Links and Lines
Globe with Links button: Insert a web site link!
Line button: Insert a horizontal line. Handy!
Alignment
Choose from flush-left, centered, or flush-right text alignment.
Lists
Bullets and Numbering button: create bulleted or numbered lists.
Indenting
Decrease Indent: Place the cursor where you would like to move the text to the left and click the "Decrease Indent" button.
Increase Indent: Place the cursor where you would like to move the text to the right and click the "Increase Indent" button.
Yahoo hasn't the best rich text editor out there for e-mail. Why not use Mac Mail... so much easier and supports RT. Yahoo having laid off personnel, I doubt if their internet based mail client sees much in the way of improvement anytime soon.
Carolyn 🙂