To facilitate online review, Microsoft Word allows you to easily make and view tracked changes and comments in a document. In order to preserve the layout of your document, Word shows some markup elements in the text of the document while others are displayed in balloons that appear in the margin.
Balloons show insertions or deletions, formatting changes, and comments.
Tracked Changes
With the Track Changes feature turned on, each insertion, deletion, or formatting change that you or a reviewer makes is tracked. As you review tracked changes, you can accept or reject each change.
Comments
As you review comments, you can delete them or respond to them.
Comment marks
Comment balloons
Print a document with markup
When you print a document with markup showing, by default, Word chooses the zoom level and page orientation to best display the markup in your printed document. You can also print only a list of all markup in a document.