If you open the composer in another, open topic, and then navigate to the closed topic, this enables the floating quote button when you highlight text in the closed topic.
- If the composer is minimised, pressing Quote will open up a new reply in the ‘reply as linked topic’ mode with the quoted text in.
- If your reply window is open, then pressing Quote will drop the quoted text into the existing reply (though you may need to minimise your keyboard on mobile to free up some screen space)