The fontch macros allow the user to change font size and family anywhere in a plain TeX document.

The present version of the package is designed to deal with the latest release of the Latin Modern fonts, version 1.106. Since it can no longer support earlier versions of the fonts, the obsolete version is retained on the archive for users who don't yet have access to the latest version of the fonts.

See also font-selection ofs plnfss.

The author is Rodrigo Medina.