If you leave this field and the List-Style Specification of Intensity Columns to Plot field blank, then all variables from the Experimental Design SAS Data Set are used. If there is no EDDS, all numeric variables in the Input SAS Data Set are used.All of the variables in the input data set are displayed in the Available Variables field.
Click to add the highlighted variable(s) to the Intensity Columns to Plot field, as shown below: