A family of Microsoft word processing software products for creating web, email, and print documents.
AFAIK this may not be possible in Word.
But see if this article is of any help
thank you but that page does not have anything on the problem
just to be clear on the query, currently i manage to get the below only by using two different user accounts. otherwise the deleted part in the middle is simply removed without trace that it was inserted earlier. it would be very helpful if someone can show how to achieve as below without the need for multiple user account. it is too troublesome to keep switching accounts and the colour difference have little meaning with regard to the revision sequence.