Use the options on the Quick tab of the Quantile-Quantile Plots dialog to quickly create a Q-Q plot. For more advanced plots, use the Advanced tab.
Variables. Click the Variables button to display the standard variable selection dialog, in which you select the variable(s) to be plotted. If you select more than one variable, then a sequence of graphs (one for each variable selected) will be produced. The selection that you make will then be displayed in the area of the dialog below the Variables button.
Distribution. Select the desired theoretical distribution for this graph. Additional distributions are available on the Advanced tab.
Plot layout. Specify the plot layout using the options in this group box.
Multiple plots in one graph. When you have chosen more than one variable to be plotted, select the Multiple plots in one graph check box to create an overlaid quantile plot. When this check box is selected, several quantile plots will be displayed in the graph: one for each selected variable. A different point marker and color is used for each of the multiple variables and referenced in the legend so that individual plots representing different variables can be discriminated in the graph. When this check box is cleared, separate graphs will be generated for each variable.
Do not assign average ranks to tied observations. This check box is selected by default, which enables you to see all data points, even the ties. When this check box is not selected, the "tied" points will overlap.