- Open the purchase entry in modify mode
- Select product by using Arrow key
- Press enter to open product child entry.
- Select the row which you want to delete by using Arrow key.
- Press "Alt + Delete" to delete that row
- Save.
Note: This procedure can be used in every transaction in FR6.
For more detail please visit: http://www.rancelab.com/help/fr6_purchase_invoice.htm