This command is only available in the tabular editor view of a watch list⮫ «Editor». It appends a new line at the end of the list and and opens an edit field in column "name" for entering a new watch variable via the input assistant (see the note in Creating Watch Lists, Recipes⮫ «Note on using the input assistant in the watch- and recipe manager:») or by typing⮫ «Creating watch lists, recipes».