Bit flags indicating which page marks are emitted for color separations.

Values:

IG_PDF_PAGE_EMIT_COLOR_BARS	Emit color bars.
IG_PDF_PAGE_EMIT_REG_MARKS	Emit register marks.
IG_PDF_PAGE_EMIT_CROP_MARKS	Emit crop marks.
IG_PDF_PAGE_EMIT_BLEED_MARKS	Emit bleed marks.
IG_PDF_PAGE_EMIT_PAGE_INFO	Emit page info.
IG_PDF_PAGE_EMIT_TRIM_MARKS	Emit trim marks.
IG_PDF_PAGE_EMIT_SLUR_MARKS	Emit slur marks.