How to user can approve or reject Purchase Order from ezee Optimus Front?

As per provided privileges from eZee Optimus back base on Outlet and User level system allow to approve or reject purchase order.

1) Add purchase order from Purchase Order tab from inventory section.

2) Recall that purchase order by clicking on that Purchase order.

3) Once you recall purchase order you can view "Cancel, Approve, Reject and Save" tab.

4) As per selected button you can view purchase order status refer below screenshot.