Add a label to a data set, assign a READ password, and specify how to sort the data. LABEL= adds a data set label to the data set GROUP. READ= assigns GREEN as the read password. The password appears as Xs in the SAS log. SAS issues a warning message if you specify a level of password protection on a SAS file that does not include alter protection. SORTEDBY= specifies how the data is sorted.

   modify group (label='Test Subjects' read=green sortedby=lname);