An example when copying a purchase is useful is when you usually buy the same products from the same supplier. Instead of creating a new purchase from scratch, just copy a previous purchase data into a new Purchase to ease the process.
Select an existing purchase in Purchases table and click on
Copy Purchase button in Purchases Command bar.
The system will open Create Purchase screen with data copied from the selected purchase:
Data that will be copied (marked with green on the screenshot):
Product items data: all products with quantities and price.
Data that is not copied and has to be entered additionaly (marked with red on the screenshot):