It is for quoting more than one person. It allows you to go through and select different replies from different posts that you want to quote in your reply.
If there are several places in a thread that you want to quote in your reply then you can click that next to 2 or more posts and then reply with quote and it will put them in your reply all formatted so you can reply to each quote.
It is for quoting more than one person. It allows you to go through and select different replies from different posts that you want to quote in your reply.