[Sure, I can explain it. If you are posting a reply to a thread with more than one post and you would like to quote more than one post you use the multi quote button.

Click the multi quote button for the first post you are quoting. Then you click the regular quote button for the 2nd post you would like to quote and then you will have both messages quoted in your post.

You can quote as many messages as you would like using the multi quote button.]
http://webmasterlighthouse.com/forum...read.php?t=111