| Name | Description | Value | 
|---|
| PDFChangesAllowedEnum.CHANGE128ANYCHANGES | Any changes allowed except extracting of pages- 128bit. | int
            5 | 
| PDFChangesAllowedEnum.CHANGE128COMMENTING | Comment allowed - 128bit. | int
            4 | 
| PDFChangesAllowedEnum.CHANGE128EDITPAGE | Editing page allowed - 128bit. | int
            2 | 
| PDFChangesAllowedEnum.CHANGE128FILLFORM | Filling in of form field and signing allowed - 128bit. | int
            3 | 
| PDFChangesAllowedEnum.CHANGE128NONE | No changes allowed - 128bit. | int
            1 | 
| PDFChangesAllowedEnum.CHANGE40ANYCHANGES | Any changes allowed except extracting of pages- 40bit. | int
            9 | 
| PDFChangesAllowedEnum.CHANGE40COMMENTING | Comment allowed - 40bit. | int
            7 | 
| PDFChangesAllowedEnum.CHANGE40NONE | No changes allowed - 40bit. | int
            6 | 
| PDFChangesAllowedEnum.CHANGE40PAGELAYOUT | Page layout allowed - 40bit. | int
            8 |