This is the Drupal Tip #2, how to support Message Quoting in your forum.
One of the most widely spread features in forum software is the ability of quoting other users' posts, in order to make the reading of the topic more comfortable. Readers understand whom you answer and what question or affirmation was the base of your message.
As the previous Smileys tip, an existing Quote module perfectly suits your need for this feature. It actually adds a new action for every comments, and will prefill the reply form with the comment that you wanted to quote. The quoted message will appear in white (default) and is really easy to distinguish from your original post.
You've done it, the quote module is now available and properly configured. Want a demonstration? See our Discussion Forum!