Reading Topic: Link. How to insert?
After you click 'Add Reply' and you're sitting at the reply screen you will see a 'URL' button on the toolbar above the text insertion field. Click on that. You will then be prompted to add text that describes your link. Put in some text (it can even be the link itself if you want). Then after you hit OK another box will appear asking you to enter your actual URL link. Paste in the link. Click Ok and you're done.