You can open a PDF in many ways: from within the Reader application, from your email application, from your file system, or on a network from within a web browser. The initial view of the PDF depends on how its creator set the document properties. For example, a document may open at a particular page or magnification.
Some PDFs are restricted and open only after you enter a password provided to you by the PDF owner. If a document is encrypted, you may need the permission of its creator to open it. In the case of some restricted or certified documents, you may be prevented from printing a file or copying information to another application. If you have trouble opening a PDF or can