Indicate the variables from the Input SAS Data Set by which to merge in the annotation data set containing the Chromosome and Position variables.Note : If left blank , the merge variables are assumed to be the same as the Annotation Merge Variables specified on the Annotation tab.The Available Variables field is automatically populated with variables from the specified data set.
Left-click a single variable, or hold down while left-clicking multiple variables, from the Available Variables field.
Left-click to add the selected variable(s) to the Variables By Which to Merge Annotation Data field.