Changes are identified using a process known as revision marking. In Word, when revision marking is turned on, text that is added is shown as underlined , while text that is deleted is shown with a line through the middle . Now, as changes are made on-screen markings are very displayed similar to those used manually by editors for years. You can change the way in which Word denotes revisions. After you are through making changes in the document, or if you receive a document from someone else which has revision marks within it, you can examine each revision and decide whether to keep it or toss it out.
Word displays the revision mark.