Use this field to specify the variables containing the intensity measurements to be filtered.Only those variables specified here are filtered. However, if you leave this field and the List-Style Specification of Intensity Columns to Filter field blank, then all numeric variables in the input data set are used.All of the variables in the input data set are displayed in the Available Variables field.
Highlight one or more variables. To highlight multiple variables at once, hold down while left-clicking on them.
Click to add the highlighted variable(s) to the Intensity Columns to Filter field, as shown below: