To adjust the profit margin on an order, quote or invoice detail line, double-click in the margin column on that detail line.

Note: See Customize Order Screens for instructions on how to add the margin column if it is not being displayed.

This will bring up a window where a new margin percentage can be entered.
 
Checking “Apply to all lines” will apply the percentage to all lines on the order.

Click “OK” to apply the change.