In the Per field, enter a factor for the unit of time. For example, if you select Months as the Unit and enter 1 in the Per ...

2. In the Per field, enter a factor for the unit of time. For example, if you select Months as the Unit and enter 1 in the Per field, this sets up 1 minimum/maximum key line per 1 month. If you select Days as the Unit and enter 14 in the Per field, this sets up 1 minimum/maximum key line per 14 days.