Nothing! We just put them there sometimes. Like it?

Just kidding! Really, they’re there to show you what messages you’ve replied to, what messages you’ve forwarded, and what messages you’ve flagged for follow-up.

If you reply to AND forward the same message, Yahoo! Mail will show you the icon of what you did most recently. Make sense? If you forward a message, Yahoo! Mail puts the green forward arrow next to it. If, later, you reply to the same message, Yahoo! Mail will display the blue reply icon.

You can also flag a message to follow up on later. Here’s how:

1. Put a check beside the message you’d like to flag.
2. Above the message list, click Mark, and select Flag for Follow up.
3. Done!

Now look for the flag icon next to the message. See it?