Ok, I'll show you how (bear with my because I'm going to post, then edit my post and show the whole thing with pictures). At the moment, 12:15, this message quotes no one, by 12:19 it will.STEP Zero: this is the message with no quote, I want to edit to add your quote.
https://www.physicsforums.com/attachments/82481
STEP one: I hit reply on your message and the quote appears in the post box. I then highlight this and copy it.
https://www.physicsforums.com/attachments/82482
STEP two: I hit edit on my post and paste the copied message where I want it
https://www.physicsforums.com/attachments/82483
STEP three: I click save and then go back through adding these pictures. Make sense?