When I add CPC description in the table and the scroll down list appears it is not possible to write a new description if a description that begins with the same letter exists (eg if "Preassure increase" exists and I want to add "power supply decreases"). I am not allowed to and "Preassure increases" is filled in. A way to get around , I have found, is to select "Preassure increases" or any other description with the right first letter, and then edit (delete the letters that I do not want except the first on, then write the letters I want.