If you want to post replies to multiple posts you can select them by clicking the multi quote button . This button will change to indicate that you've selected it. Clicking post reply will then bring you to the full editor with all the posts quoted.
I tried using it in accordance with this FAQ, but I was not able to get quotes of multiple posts.
It has been working for me, like this :
With every post that I wanted to quote, I selected the Multi Quote button, once I have selected them all, I clicked on Post Reply
Originally Posted by Brad Jones
works for me. To be frank, this is the first time I am using this and I am using multi quote to compose this very reply. I love this feature. Trying to do this , I noticed a small annoyance. All the buttons ( i.e. quote, multiquote, quick post) are on the right hand side. Would it make sense to move the Post reply button also to the right hand side? It just feels a little wierd to move the mouse all the way to the left extreme after having selected multi-quote. Just a user interface consideration.. but I think the problem would be backwards compatibility for millions who are already used to seeing the Post reply on the left extreme.