If you are frustrated of scrolling up and down while composing your email replies in Gmail, THIS IS THE EXTENSION YOU NEED!
This will move the reply/compose box from the bottom of the page to the top of the page. You can now see the latest email in the thread as you type, without have to scroll up and down.
I developed this after I could not find any solution. After using it for a while, I have noticed a significant boost in email productivity … no more scrolling for those long conversation threads!
NOTE: Refresh/reopen the Gmail tab for the extension to start working.