Enable or Disable Permissions in Our UWP Viewer
The PDF specification defines a series of flags that can be set on a document to determine what a user can do with a document. These permissions are represented as a bitmask at the PDF level. When a permission bit isn’t present at its defined position, the permission is considered not granted.
PSPDFKit honors the permissions set on a document and enables or disables certain platform features based on the permission configuration. For instance, if a PDF doesn’t explicitly define the printing permission as loaded, PSPDFKit won’t enable the printing option in the UI.
The PDF specification defines the permissions shown below.
Printing: Print the document.
High-Quality Printing: Print the document in high fidelity.
Copying Content: Copy or otherwise extract text and graphics from the document.
Document Assembly: Insert, rotate, or delete pages and create document outline items or thumbnail images.
Editing Annotations and Forms: Add or modify text annotations and fill in interactive form fields.
Filling Forms: Fill in existing interactive form fields (including signature fields).
Modifying Content: Any other modifications not covered by previous permission flags.
By default, most documents will have all permissions marked as granted.
PSPDFKit has support for the above permissions on a per-platform basis. This is ongoing work, and support for more permissions is being worked on to reach feature parity across platforms.
The permissions will be honored when the document is unlocked with a user password (in case there’s one). Please note that a PDF document can have both an owner password and a user password (read more). We recommend not using the same value for both the owner and user password.
Below you’ll find a detailed breakdown of the permissions that can be set.
This permission is currently not honored by PSPDFKit for Windows, and our
PrintHelper will always print at a resolution of 150 DPI.
When this permission isn’t given, users aren’t allowed to select text in a document. This permission is honored by default, but it can be disabled by setting the
PSPDFKit.UI.PdfView.IgnoreDocumentPermissions property to
This permission is currently not honored by PSPDFKit for Windows.
When this permission is disabled, users aren’t allowed to fill out forms. This is honored by default.
This permission specifies whether or not modifying a document’s contents is allowed. Modification is honored by default, but it can be disabled through the
ReadOnly property of the
Disabling the default permission doesn’t affect the original file; instead, it affects how the final user can interact with the document.