r and a in the list, and the palette's Reply, needed the thread's messages, which are read only once it is opened; on a thread not yet opened they said to open it first, and the palette offered no reply. They now read the thread themselves and start the reply once it comes, if the thread is still the one selected; a thread moved on from gets no reply. The reader reads a thread asked for this way whether it shows it or not, and tells the desk when any thread comes.