We have the same timetable each day in given term or week

If you have exactly the same timetable each day then you probably don’t need to see in 5 columns at them main screen. What you need to do is to show the days combobox see above and then pick Days merged:

Combine this with the “show all terms separately” in the combobox for terms and you will get a view with one column for each Term and with this column all days are merged, so you have only the periods as subcolumns.
Note: you still can have some lessons that are on different positions each day. If you for example have all lessons at the same periods each day, only one lesson is different on Tuesday and thursdsay, the software will simply put two entries into to appropriate column.