# Destination Rectangle

If you enable the Destination Rectangle checkbox, a graphic representing the destination rectangle appears over the Current.UndistortedCalibrationImage, as shown in the following figure:

Use the graphic in the Current.UndistortedCalibrationImage buffer to specify the area of the image where you do not want to process the unfilled boundary pixels, or use the parameters in the Warping tab to provide precise measurements.

If you are performing linescan calibration, the Origin Y and Height values of the rectangle are ignored; only the Origin X and Width are used.