Am using CR 8.5 Win 2000 and would like to give the person opening my report (using a crystal viewer)the option of viewing the report showing groups by "unit" or just a basic list of patients in alphabetical order. I created a formula called "unit" which says that if {location}in ['1','2','3'] then 'UNIT 1'else if {location} in ['4','5','6'] then 'unit 2' , then I created a group with the formula 'unit'. Can't figure out how to create a parameter without using a field from the table to give the viewer an option of grouping the report or not grouping.