You can group/combine same items on a Sales Order and Invoice. This is helpful if you have multiple lines on Sales Order that are the same item or if you are invoicing multiple Sales Order together onto one invoice.
This functionality is purely for display/printing purposes. The actual data will remain exactly as it was typed in.
Items must have the same ShipTo, Item code, Item Description, Notes, Full SOC Description (configuration), and Sell Price.
In order to do this you must modify the Sales Order Type (SOTYPE) rule. Select the SO Type(s) you want to combine same items on and click EDIT. Check the box that says GrpLikeItems and click SAVE.