To add approve leave, go to Attendance > Approve Leave then click on Add button present at top right corner in the approve list page, at click of this button Add Leave modal will open.

Here select Class, Section and Student and enter Apply Date, From Date, To Date, Reason and Attach Document (if you want to attach any file) and then click on Save button. You can view this added record in the below of the page.

Add approve leave image

Here select  Class and Section and then click on Search button. The list of approve leave will be shown in the below of the page.

Approve leave list image 

To disapprove leave click on Approve icon and to edit leave click on Edit icon and to delete leave click on Delete icon present in the approve leave list.