Specifies control parameters for PDF image saving.
Values:
| IG_PDF_LINEARIZED | Writes the file linearized for page serving over the remote connections. |
| IG_PDF_OPTIMIZED | Performs garbage collection on unreferenced objects. |
| IG_PDF_DONT_SAVE_FILE_ATTRIBUTES | Prevents the file attributes and security settings of a PDF document opened from an existing PDF file from being copied over when saved to a new PDF file. |