I wish to change from absolute to relative coordinates upon right clicking over the coordinate  numbers in the lower  leftthe box with relative , absolute and off  appearsI am able to change between absolute and off but not relativethe relative option  looks  grayed  out  How do I activate relative coordinates for measuring?

Is COORDS set to a value of 2?  If so then it means.....Relative polar coordinates - When you are specifying a point, distance, or an angle.Absolute coordinates - At all other times.
John Connor2015-04-13 16:20:35

yes coords value is set to  2 thanks john