What is a ZRTF File Type?
To create a ZRTF file select File → Save as... or Save copy as..., file name, select the' backup location, select "Nisus Compressed Rich Text" from the menu; File Format "drop-down menu, and click Save.
To open a ZRTF file, simply double click on the file @-@, or select File & & rarr; Open..., go to your file, and select Open.
The ZRTF file is saved in a proprietary format, but if you rename the name.zrtf file to name.rtf.zip file, the Finder will develop the file into an RTF file.