Omni Systems, Inc. Mif2Go User's Guide, Version 55
> 5 Setting basic conversion options > 5.7 Processing graphics > 5.7.4 Identifying exported graphics files > 5.7.4.3 Naming external graphic metafiles
Mif2Go generates external metafiles for WinHelp; see §31.2.6 Embedding bitmap graphics in WMF for WinHelp for more information.
By default, Mif2Go uses the first five characters of the base file name, and adds a three-digit number. You can change the number of characters and digits:
; MetaNameChars = chars from base file name
; to use in external WMF file names
; MetaNumDigits = number of digits
; to use in external WMF file names
Each appearance of a graphic produces a new file, even if the same graphic has appeared before; and for WinHelp each subscript, superscript, and symbol also produces a metafile. To decide how many characters and digits to specify, consider all of the following: