just in case the other thread was a bit confusing.
1. Left click and drag the area you wish to "quote". It will light up blue
2right click and copy to save what you jut highlighted
3 you now have a line quoted and saved
4 go to your response and , as you reply, and wherever you wish to insert that quote, just left click the quote button and it will appear as this in your reply box
I then spread the two boxes part and insert my saved quote in between the two boxes. enter and you now should see your quote in a dialogue box
I just quoted myelf