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. |