Here's how to make text in Yahoo Mail messages stand out by changing its style. Instructions are for the standard Yahoo Mail web version. Yahoo Mail Basic and the Yahoo Mail mobile app offer limited formatting options.
Highlight text in email messages (#1421)
Here's how to format text to make it stand out:
Select the text you want to emphasize.
Choose the desired formatting from the bar at the bottom. Options are B (bold), I (italic), the three colored dots (text color and background), and Aa (size and font).