Hierarchy is page where you can set you company tree and units that belongs to it.

 Salary period

Salary period is usully a period for which calculations are made. In this cell you set day of start of salary peiod. Usually is used 1 day, for example 01 or 16 of the month. But if you need to change day of salary period you can use dates 16.03.2019 – 20.04.2019, then before indicated period salary periods will start 16 and end 15 of month and after it start 20 and end 19 of the month. You can add more then one changing periods, separate them by – ;