See the date or reviewer name for a tracked change or comment

If the balloons are visible, you can rest the insertion point over the balloon to display the date and the name of the reviewer.
If the balloons are hidden, click Reviewing Pane on the Reviewing toolbar. The Reviewing Pane lists information about each markup item, including the name of each reviewer and when a tracked change or comment was made.

Identify reviewers by the colors used for changes and comments

If you're using the default color scheme for tracked changes and comments, Microsoft Word automatically assigns a different color to each reviewer.

On the Reviewing toolbar, click Show, and click Reviewers.
Each check box indicates the color that is assigned to a particular reviewer.

Note To restore the default color scheme, click Show on the Reviewing toolbar, and then click Options. Under Track Changes options next to Color, click By author.