Abstract: Project planning software is made available to a user within an automation environment. Table editors or grids are implemented therein. Some columns are logically linked to one another, which would preclude such columns being separated. Nevertheless, it is possible to separate columns within the course of moving or hiding them. The logic of the table editor is thus destroyed however. A “Twin Columns” feature is provided and columns which are logically linked to one another are defined as a unit. They are thus permanently coupled to one another and cannot be separated within the course of the processing of a table. The logic of the table editor is thus maintained.