OK.
I am angry now so my words are coming from “angered Marina”.
I have an order from returning buyer and he typed long message and I typed a long message back but when I was going to click “offer more extras” the whole page went up for a millimeter by itself and I clicked with my mouse on “clear message” and I said ok, CTRL+Z, but it is not working. There is no UNDO to clear the message. So now I have to recollect 15 minutes of typing plus the wasted time he is waiting for my response.