The default font table includes the fonts recommended for WebCGM, which
are compatible with the Computer Graphics Metafile input filter for
Microsoft Office and Corel Draw. Another application might use
different fonts and/or different font names, which may not be
documented. The nofontlist (synonym winword6) option deletes the font
table from the CGM file. In this case, the reading application should
use a default table. Gnuplot will still use its own default font table
to select font indices. Thus, 'Helvetica' will give you an index of 1,
which should get you the first entry in your application's default font
table. 'Helvetica Bold' will give you its second entry, etc.