Via‘Settings (gear icon top right)’ ⇒ ‘Leavedays’ ⇒ ‘Request per’, you can select per type of leave which unit of time may be used in a request. The default option is that each type of leave may be requested by the minute. 

The option ‘request in’ allows you to choose the minimum amount in a specific type of leave. To do this, select ‘add new rule’.

It is now possible to add a new rule containing the following options:

• Employment: Select the employment to which this rule applies. In case nothing is selected here, the rule will be applied to all employments.
• Type of leave: Select the type of leave to which this rule applies. In case nothing is selected here, the rule will be applied to all types of leave.
• Per minute: This means that leave can be requested per minute. 
  Per fifteen minutes: This means that leave can be requested in units of fifteen minutes. 
  Per half hour: This means that leave can be requested in units of 30 minutes.
  Per hour: This means that leave can be requested in units of 60 minutes. 
  Day: This means that only full days can be requested
  Shift: This means that the system will check the schedule to decide the shift unit. This option allows employees for each day to request a morning shift, an afternoon shift, or a full day.
  2, 4, 6 or 8 hours: Only time periods of two hours or its multiplications can be requested.

Then select save. The rule has now been applied and will be visible in the overview.

It is possible to add more rules.