Originally Posted by JT

While viewing a thread, click on the icon that is found in the post of the thread that you wish to quote in your reply. Notice that the ++" will turn green, indicating it has been selected. You can select multiple posts by clicking on that icon found in each post. When you're ready to reply, click on the reply button. You'll then notice all the quotes that you had selected are in the message box. You then place your reply comments in the appropriate areas.

By the way, the feature is powerful. The multi-quote isn't limited to posts that are in the same thread that you're replying to. In those cases, you'll see a notice below the reply box that will say something to the effect of:

Originally Posted by MetalliCamaroRS

There is an example for you. All I had to do was click the multi-quote button under each post and hit reply. It's quicker than formatting it yourself and keeps the clutter down from past instances where people would make a new reply for each quote.

Originally Posted by Zap Racing

Had a couple PM's about how the new multi quote feature works and why. Here's the answer I got. In fact, I used it to create this post/thread.