A number of periodes are already predefined.
Overview:
Step 1:
Go to the screen Time/e-HR and click on the tab "Definition results". Next you click on "Periods".
Step 2:
Next you click on the icon .
Step 3:
Add a description to your period, e.g. "five weeks".
Eventually you specify the start date that is applicable to the period.
Finally you click on , after which this new period is created.