Editing Rich Text Format (section)

===Pictures===
RTF supports inclusion of JPEG, PNG, Enhanced Metafile (EMF), [[Windows Metafile]] (WMF), Apple PICT, Windows device-dependent bitmap, Windows device-independent bitmap and OS/2 Metafile picture types in hexadecimal (the default) or binary format in a RTF file. Not all of these picture types are supported in all RTF readers, however. When a RTF document is opened in software that does not support the picture type of an inserted picture, the picture is not displayed. RTF writers usually either convert an inserted picture in an unsupported picture type to one in a supported picture type, or do not include picture at all.

For better compatibility with Microsoft products, some RTF writers include the same picture in two different picture types in one RTF file: one supported picture type to display, and one uncompressed WMF copy of the original picture to improve compatibility with some Microsoft applications like [[Wordpad]].<ref name="support.microsoft.com">{{cite web |url=http://support.microsoft.com/kb/224663/en-us |title=Document file size increases with EMF, PNG, GIF, or JPEG graphics in Word |access-date=2011-03-01}}</ref>

This method increases the RTF file size dramatically. The RTF specification does not require this method, and several implementations do not include the WMF copy (e.g. Abiword or Ted).

For Microsoft Word, it is also possible to set a specific registry value ("ExportPictureWithMetafile=0") to prevent Word from saving the WMF copy.<ref name="support.microsoft.com"/>