A_T00 Specify the assumed constant for A_T00. The default value is 3. To Specify a Value: Either enter the desired value in the text field or move the slider to the right or to the left to change the value. Tip: To change the scale of the slider, right-click on the slider and select Rescale Slider from the pop-up menu. Change the upper or lower boundaries in the that appears, to rescale the slider and click OK.