Variables for Which to Display Distributions Use this field to specify the variables for which you want to display the univariate distributions. To Specify Variables for Which to Display Distributions: Specify an Input SAS Data Set. All of the variables in the input data set are displayed in the Available Variables field. Examine the list of available variables. Highlight one or more variables. Click to add the highlighted variable(s) to the Variables for Which to Display Distributions field, as shown below: