Each day, new messages arrive and push down older ones in your inbox. That makes it easy to lose track of what's most important to you. But now when you use Hotmail on the web, flagged messages will stay at the top of your inbox until you decide to unflag them.
If you're reading a message, you can flag or unflag it by clicking the Flag in the message header. (Try it now on this message.)
When you're looking at the whole message list, just hover over a message and you can