Each icon and backdrop image is stored as a separate file. Typically, an icon is specified with the base part of its file name. For example, an icon might be referenced with the name mail when the file is actually stored as:
/usr/dt/appconfig/icons/language/mail.l.pm
The file-naming convention of adding suffixes helps group icons by size and type. Icon names for desktop components are in these general formats:
basename.size.format
Or
basename.format
where:
basename—the image base name used to reference the image
size—a letter indicating the size: l (large) m (medium) s (small) t (tiny)
format—file format: pm (pixmap) bm (bitmap)