Once an Estimate is Approved, you can now Create PO's from the expense lines.
You can either click the Create PO button from the top of the Estimate, or from within each detail line.
When you click the top Create PO button, this allows you to choose all lines at one time to generate the PO(s) accordingly.
This will create one PO per vendor, even if there are multiple lines in the estimate.
Clicking Create PO from within the Line Details will generate a single PO instantly for that line and its vendor.
From here you can follow the predefined approval process for POs.
For the continuation of the PO process, please refer to the Purchase Order guide.