Formula Ref Sheet Index - Version 1 Extremely handy add-in that will instantly change your formulae references from Absolute to Relative and vice versa. Works on Selection, Active sheet or the entire Workbook. Sheet Index add-in will create an Index sheet of all sheets in your Workbook. Additional option allows you to create a link back to Index link on all sheets.Paid version comes with FREE file size reducer for Excel Workbooks.