Documents that need to be shared or printed across platforms are often distributed as PDF (Portable Document Format) files. PDF files can be created using OpenOffice.org suite or other applications. The GNOME PDF viewer is called Evince. It can be used to view PDFs and many other document formats, like PostScript, DjVu, DVI, and multi-page TIFFs.
To start Evince, press Alt+F2 and enter evince or click + + + .