LibreOffice allows to add comments to Writer documents, with the menu Insert > Comment (shortcut: Ctrl+Alt+C). Comments can be added to a single word, a sentence, a paragraph, a link, or a specific point in the text. This feature is useful, for instance, to collect comments on a document before the final version. Comments have a different color for each user, to make it easier to attribute them to the right person. The down arrow on the right side of each comment allows to delete the single comment, all comments from an author, all comments from all authors, or to format all comments.