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Choose which programs Opera should use to handle specific protocols.
You can create your own list of programs to launch when executing particular protocols in Opera. The default list includes:
|mailto||Choose which application Opera should use for e-mail; Opera's own built-in client, the default e-mail client on your computer, or a specific other e-mail client.|
|telnet||Communicate with other computers through a command-line interface.|
|tn3270||For communication with IBM mainframes. See IETF RFC 1576 for specifications.|
The source viewer is the program you want to launch when you selector press Ctrl+F3 to see the source of a Web page.
By default, Opera will use its own built-in source viewer.
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