Editing Rich Text Format (section)

===Annotations===
Since RTF 1.0, the RTF specification has supported document annotations/comments.<ref name="rtf10-txt" /> The RTF 1.7 specification defined some new features for annotations, including the date stamp (there was previously only "time stamp") and parents of annotations.<ref name="rtf17" /> When a RTF document with annotations is opened in an application that does not support RTF annotations, the annotations are not shown. Similarly, when a document with annotations is saved as RTF in an application that does not support RTF annotations, the annotations are not preserved in the RTF file. Some implementations, like Abiword (since version 2.8) and IBM Lotus Symphony (up to version 1.3), may hide annotations by default or require some user action to display them.

The RTF specification also supports footnotes, which are widely supported in RTF implementations (e.g. in OpenOffice.org, Abiword, KWord, Ted, but not in Wordpad). Endnotes are implemented as a variation on footnotes, so applications that support footnotes but not endnotes will render an endnote as a footnote.

Microsoft products do not support comments within footers, footnotes or headers. Similarly, Microsoft products do not support footnotes in headers, footers, or comments. Inserting a comment or a footnote in one of these disallowed contexts may result in a corrupted document.<ref name="rtf191" />