How do I multi quote in a post?

Hi there, kind of a dumb question, but how do you put several quotes into one post? When i'm threads where I want to answer a few different posts I have to do it seperately but know that there is a way to put all the quotes on one and type response to each underneath each one. I just don't know how! Help! x

You know where the quote button is on the bottom right? Well theres a little + sign next to it, click that on each post you want to quote and when you go to reply they will all come up

Thank you, much appreciated