To get to these settings you must have the Sales Order module open and click on the black bars at the top right of the screen.
Then select “Sales Order Options” to get to these settings.
Group orders by- This will list Sales orders by a common criteria in the Sales Order module.
Sales Orders are grouped by customer in this image.
Default QTY- This setting will allow you to set a default quantity for line items
Default Quantity is set to 2 in this image