The
and
buttons are for that purpose.
When you use the
button in the post you wish to reply to, you are brought to a page where you can compose your reply. The text box where you type in your reply will already have the original post in QUOTE tags. Also, the first or opening QUOTE tag will contain additional data which causes the originator of the post you quoted to appear. You then enter your reply and click on the
Submit Reply button to save the post.
The
is used for quoting multiple posts in your reply. You simply click that button on every post you want quoted in your reply, except for the last one. One that post use the
button. This will bring up the page where you compose your reply. The text box will already contain all of the posts where you used the
button. Again, you then enter your reply and click on the
Submit Reply button to save the post.