In the day as well as the week perspective of the calender the left timeline can not be changed - it is just an hourly step and you can not make the time line steps bigger and thus see the entire day without having to scroll down.
steps to reproduce:
1. Select the daily or weekly view.
2. Try to expand or crop the timeslots (at the moment they all are 1 hour) to more or less.
It is not possible, nothing happens.
the timeslots get bigger or smaller.