You can create two types of normal quantile plots:
• Plot Actual by Quantile creates a plot of the response values versus the normal quantile values. The quantiles are computed and plotted separately for each level of the X variable.
• Plot Quantile by Actual creates a plot of the normal quantile values versus the response values. The quantiles are computed and plotted separately for each level of the X variable.
The Line of Fit option shows or hides the lines of fit on the quantile plots.