Opera Software

Program Preferences

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Choose which programs Opera should use to handle specific protocols.

E-mail application

Select whether you want to:

  1. Use Opera's built-in e-mail client
  2. Use the default e-mail client on your computer
  3. Specify an e-mail client on your computer

Protocol manager

You can create your own list of programs to launch when executing particular protocols in Opera. The default list includes:

Protocol Purpose
telnet Communicate with other computers through a command-line interface.
tn3270 For communication with IBM mainframes. See IETF RFC 1576 for specifications.
mms Pass streaming Windows Media files to a multimedia player.
rtsp Pass streaming Real Media files to a multimedia player.

You can ask Opera to make sure at each start-up that it is the default browser on your computer.

Source viewer

The source viewer is the program you want to launch when you select View > Source or press Ctrl+F3 to see the source of a Web page.