This invention relates to an editor system for graphical user interfaces used in personal devices, and to a method for enabling a user to selectively display data and edit parameters on the user interface, and to a personal device, like a wristop or a diving computer. In order to edit the graphical user interface having at least one display view, where each set of data fields are arranged in a predetermined manner on the display view, the inventive editor system provides user access to a data field out of a set of data fields to allow user selection of parameters in this field. A list of parameter options valid for said field is displayed for selection by the user, the parameter value of which is to be displayed in said field.