Simply enter the names of the days and the periods as you want them displayed. The program will automatically increment the number of days or periods as required. To edit a line, select that line either by using the arrow keys or clicking on it with the mouse cursor. You may either double click on the cell or press the 'F2' key to edit the existing information or you may simply start typing and the old information will be overridden.
You are not limited by the number of days or periods in the timetable.
Please Note: The program assumes that all period lengths are the same when it tries to solve the timetables. You may however tag a period as a non-standard period if you assign it as a miscellaneous period.