Which option must be selected in the Track Changes menu to highlight changes made since the last save?

Selecting the option that enables "Track changes while editing" is essential for highlighting modifications made to a document since the last save. When this feature is activated, any alterations to the text, such as additions, deletions, or format changes, will be captured and marked visually within the document. This allows users to see what has been changed at a glance, which is particularly beneficial during collaborative editing or review processes.

Activating this option establishes a system for monitoring all edits that occur, creating a clear record of changes to evaluate later. This is fundamental for maintaining the integrity of the document, ensuring that no important modifications are overlooked, and enabling reviewers to easily accept or reject individual changes. By using this feature, users enhance their ability to effectively collaborate and manage revisions in their documents.