Viewers do not launch a separate application to display the contents of a file. Instead, viewers show the contents of the file inside a file manager window. Viewers usually start much more quickly than applications, but have very limited functionality.Viewers are not part of the File Roller application. Viewers are provided by other GNOME applications and use special technology called bonobo which enables the viewers to work inside a file manager window. The number of viewers available to File Roller depends on the bonobo-enabled applications installed on your system.
