RTFD文件是文本文件,提供包含PDF文件,其他文件和文档或图片附件的支持。这些文本文件在RTFD扩展基本上具有相同的支持和RTF文档的功能,但通常被称为富文本文档目录的文件。最初,RTFD格式技术被用于下一代操作系统版本开发的,而今天,Mac OS X提供这些RTFD文件的更多支持。在Mac OS X,用户可以打开和查看在右键菜单中选择“显示包内容”连接到这些RTFD文件的内容,而这些附件大多是添加到一个RTF文档的其他文件。
Apple TextEdit is a text editor program and an open-source word processor too, which is first used in NeXTSTEP and OPENSTEP, but now integrated in most recent versions of Mac OS X. It is also considered a GNUstep application for other operating systems that are Unix based, like Linux computers. This program is operated by Advanced Typography by Apple so expect several advanced typography related features. The main function of this software is to read and write documents in plain text, HTML formats, Rich Text Format, and Rich Text Format Directory. It can also open Simple Text files but does not have the capability to save documents of that format. Mac OS X version 10.3 supports Microsoft Word documents, while Mac OS X version 10.4 can open and save Word documents in XML file. Mac OS X version 10.5 is able to read and write Office Open XML as well as OpenDocument Text. Features included on TextEdit are formatted text support, addition of graphics, animations and other multi-media contents, automatic adjustment of letter spacing, as well as reading and writing support of character encodings.