After constructing your Service or Standard estimate, you have the ability to set a Custom Price or Override the Price/Profit for your Services or Work Areas, respectively.
This can be achieved by clicking on the drop-down arrow immediately to the right of the EDIT/CLOSE button on the far-left corner of your Service or Work Area.
This option will not update the total price for the estimate - only per work area.
NOTE: the button is titled "Edit" if your Service/Work Area is not expanded. The button reverts to "Close" if your Service/Work Area has been expanded.