
When you press quote the screen should switch to a reply window...if you wanna highlight something..highlight the parts you don't need and erase them...once you hit quote...unless you want to PM the person...if you write under it that is your post to the thread.
If you want to copy what you highlighted...right click on the highlight and copy...

make sure you're not clicking on the snowflakes tho...they sometimes get in the way...lol..and then it would show like you copied nothing.

hope tha makes sense...