anchor.diff:     (activep
       :initform      nil
       :documentation "Labels are by default not active and can not be selected when cycling through the elements."))
  -  
  +
     (:documentation "A single-line string displayed at the specified position."))
   
   (defclass checkbox (element)
  
positive.code:     (when position
        (setf y (car position)
              x (cadr position)))
      
      ;; the keyword dimensions overrides width and height
      (when dimensions
        (setf height (car dimensions)
  
negative.code:     :initform      t
      :type          boolean
      :documentation
      "If t (default), the #\return character (CR ^M \r) is automatically translated to newline (NL) on input,
       and NL is translated to CR LF on output.
       NL is the standard, system independent, portable way to end a line.
       It can be either #\linefeed (LF ^J \n) on Linux, carriage #\return on MacOS, CRLF \r\n on Windows.
       Setting newline translation to nil is necessary to be able to detect the #\return key.")
  