You can view all markup (markup: Comments and tracked changes such as insertions, deletions, and formatting changes. View markup when you want to process tracked changes and comments. Print a document with markup to keep a record of changes made to a document.) changes in your document, or you can limit the kind of change that's displayed. For example, you can use the Show menu to hide formatting changes and comments so that you can concentrate on insertions and deletions. Or, you can display comments and changes for a specific reviewer.

Note If you hide a type of markup by clearing it on the Show menu, the markup automatically appears each time the document is opened unless you clear the Make hidden markup visible when opening or saving check box on the Security tab of the Options dialog box (Tools menu). Even if you clear this check box, the markup is still in the document and can be revealed by selecting the type of markup on the Show menu.
You can also change how Microsoft Word displays markup by clicking one of the Display for Review settings on the Reviewing
toolbar (toolbar: A bar with buttons and options that you use to carry out commands. To display a toolbar, press ALT and then SHIFT+F10.).

By changing this setting, you can preview a document with changes before you actually accept or reject those changes.
Show markup in a Web page
When you save a document with tracked changes (tracked change: A mark that shows where a deletion, insertion, or other editing change has been made in a document.) or comments (comment: A note or annotation that an author or reviewer adds to a document. Microsoft Word displays the comment in a balloon in the margin of the document or in the Reviewing Pane.) as a Web page, Word retains the tracked changes and comments.
How the tracked changes and comments are displayed depends on your browser (browser: Software that interprets HTML files, formats them into Web pages, and displays them. A Web browser, such as Microsoft Internet Explorer, can follow hyperlinks, transfer files, and play sound or video files that are embedded in Web pages.). In Microsoft Internet Explorer 4.0 or later, the revised text is highlighted with color, underlining, and strikethrough formatting, and comments are shown as dynamic ScreenTips (ScreenTip: A short description that appears when the user holds the mouse pointer over an object, such as a button or hyperlink.). In browsers earlier than Internet Explorer 4.0, the comments appear as footnotes beneath the main Web page.