Use this option to specify the number of principal components. to use when fitting a logistic propensity score model1.Specify 0 for no propensity scoring.Tip: To change the scale of the slider, right-click on the slider and select from the pop-up menu. Change the upper and/or lower boundaries in the window that appears, to rescale the slider and click .
Refer to SAS Usage Note 30971 for more information about propensity scoring