creo7 Drawing Setup option documentation for: SYMBOL_FONT 
(Also MBD)
symbol_font
Defines the font used for symbols available within Creo annotations
Default and Available Settings:
asme* - Provides the ASME symbols in TrueType font in the text symbol palette .
iso - Provides the ISO symbols in TrueType font in the text symbol palette .
legacy - Provides the legacy symbols in the text symbol palette in the font native to
Creo.
stroked_asme - Provides the same set of symbols as the ASME value, but in the font native to
Creo.
stroked_iso - Provides the same set of symbols as the ISO value, but in the font native to
Creo.