Clarification

["Brian J. McHugh" <bjmchugh@xxxxxxxxx>]

Dear apsfilter-help,

If one wishes to use a PostScript Level 1 printer, I am aware that they 
must use the special PSgs driver which uses the "pswrite", "psgray" 
and "psmono" ghostscript devices. I am also aware that they also must 
add "-dLanguageLevel=1" to the GS_FEATURES variable for the PostScript 
Level 1 printer. 

As a simple test, I issued the following three commands to test the 
ghostscript devices:

   > gs -sDEVICE=psmono -sOutputFile=convert.ps tiger.ps
   > gs -sDEVICE=psgray -sOutputFile=convert.ps tiger.ps
   > gs -sDEVICE=pswrite -sOutputFile=convert.ps tiger.ps

In all three cases, the generated file (convert.ps), was PostScript 
Level 3 and not PostScript Level 1. Is it true that setting the 
GS_FEATURES is the only thing that determines the level of PostScript 
that is generated?

Thanks,
Brian