The Printer Font Metrics (PFM) Editor is a Microsoft Windows application that a font vendor can use to create and edit PFM files and create Printer Cartridge Metrics (PCM) files for Hewlett-Packard printers and printer drivers that use Printer Control Language (PCL). The PFM Editor simplifies and accelerates the task of creating PFM files by not requiring a great deal of knowledge about either the PFM file format or Windows device drivers. The PFM Editor allows developers with some font experience to create the information file needed by the driver to support the cartridge.
The PFM Editor reads the filename of a PFM file from the command line in the WIN.INI file. Thus, defining the PFM extension in WIN.INI allows the user to double-click PFM files to edit them.