Rapid-Pi Fonts are the fonts used by Rapid-Pi to display mathematical symbols. If you don't have Rapid-Pi installed on your computer, you will need to get Rapid-Pi Fonts to be able to view documents containing Rapid-Pi equations.

NOTE: Rapid-Pi 2.0 supports rendering equations in "Portability Mode" Portability Mode equations can be viewed on any computer without requiring Rapid-Pi fonts. Portability Mode equations look the same as normal equations when viewed on the screen (without zooming) but have a lower quality when printed. You can turn on Portability Mode via the Edit menu in Rapid-Pi.

Rapid-Pi Fonts are available for download free of charge:

Download Rapid-Pi Fonts

Please run the downloaded file to install the fonts.