So you received the first delivery (click here to see how to receive a delivery) which was "Partially received" and you need to receive a second delivery for the same order.
Click Purchasing > Receive new delivery and look for the delivery number, just as you did to receive the first delivery. The missing items will be automatically populated and you're able to edit everything to make sure data is correct.
You can remove items, change prices & quantities and click on "Save" once you're done.
You will then be taken to the Delivery Reconciliation page, where you can view your delivered items side by side with the items you ordered.
Now the order has finally been delivered in full, you can click on the green "Fully received" button.
This will take you to the "Purchase Order" delivery confirmation page, which shows the order summary.