How can I define Extra columns?

For each printout you can define several additional columns or rows. Just click on Extra columns/rows and new window will be displayed. Click on firs row for columns or rows and choose one of available option. Set also Header text and width of column (or high of row).

Options depend on selected printed report. If you use e.g. Summary timetables for teachers, many more options for extra columns/rows will be displayed.