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4.7 Your PostScript magic number

a2ps produces full DSC conformant PostScript (see Glossary). Adobe said

Thou shalt start your PostScript DSC conformant files with

%!PS-Adobe-3.0

The bad news is that some printers will reject this header. Then you may change this header without any worry since the PostScript produced by a2ps is also 100% PostScript level 1².

Configuration Setting: OutputFirstLine: magic-number ¶

Specify the header of the produced PostScript file to be magic-number. Typical values include ‘%!PS-Adobe-2.0’, or just ‘%!’.