Map variables to a check box If you map a variable to a check box, the variable value is always used to determine if the field is true or false. Before you beginRoles required: activity_admin, activity_creator About this task Check boxes mapped to a variable are marked with a link icon () and set to read-only. If the check box is already selected when you map a variable to it, the system clears the check box, adds the link icon, and then makes the field read-only. Procedure Point the cursor to the link icon to see the variable name. Click the icon to delete the mapping.