Can't multi quote...

I once had this down pat - can’t seem to do it anymore.
For each response you wish to quote, you click on the “+” button on the bottom, then all the way to the bottom, you select advanced, right? That’s what I thought I did before. Now, when I do, nothing appears in the response box. What am I forgetting? Thanks!

After selecting all the ones you want to quote, click the blue “Post Reply” button to the left side above the quick reply box.

Got it! Thanks so much.