You must have a copy of the Adobe Acrobat Reader Software installed to view the .PDF file. The Adobe home page provides explicit downloading and installation instructions, including a three-step process to register, select the appropriate software version, and configure your web browser.
Customer support is also available.
Other functions that can be performed in the view mode are printing, copying, and pasting to the clipboard. The size of the .PDF file is included for your information. This data can help you determine the time required to download the document. The file size will also determine the time the Acrobat viewer needs to load the file into memory.