Javelin PDF readers provide all the core functionality needed for viewing standard PDF files and PDF files encrypted using our free Drumlin Publisher Digital Rights Management (DRM) software and Service. These readers support internal and external hyperlinks, contents/navigation trees, a range of page display formats, plus document text searching, annotation and markup. Encrypted files are protected against content copying and onwards distribution. They may also have restrictions applied such as whether printing is permitted and whether they expire at some point and can no longer be viewed. For full details see our PDF Wiki, Javelin Secure PDF readers section.