You can override the elements of a line item in two different ways. The first is used if you need to override only one item, and the other is used if you need to override multiple elements of multiple items. For either method, first go to the scope of damage page of the estimate and double click on the area that contains the item(s).
If you are only editing one item, click on the List button in the upper left hand corner, then double click on the item in question. This will bring up the line item override screen, from which you can edit any element of the item.
If you need to edit multiple items, click on the Manual button in the upper left hand corner. This will display all items in the area, with tha ability to more easily edit one area or item, and move on to editing the next.