Academic Settings / Timetable / Timetable Settings / Timetable Creation Settings / Default Min Minutes of Timetable Period per Lesson
The default value of min minutes a lesson has when it is added to the timetable calendar if a lesson has not that value set in the Unit properties (i.e. you can define a minimum number of minutes per Unit in the Unit form / timetable TAB. When the user drags and drops a new session in the timetable, the default cell created will be so many minutes as defined here.
Setting -> Active -> 25
Figure 1
Setting -> Inactive -> Default value -> 60
Figure 2
