Notes about the RFR file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The RFR file type is primarily associated with 'Photoshop' by Adobe Systems Incorporated. Frame files contain scalable tiles and corners that you apply to any rectangular selection. A variety of companies offer such filters and they usually also work in Paint Shop Pro and Fireworkd graphic editors.