Opera Software
  1. Toolbars
  2. Menus
  3. Panels
  4. Bookmarks
  5. Widgets
  6. Notes
  7. Content Blocking
  8. BitTorrent
  9. Display Modes
  10. Source Viewer
  11. Preferences
  12. Advanced Preferences
  13. Skins
  14. Keyboard Shortcuts
  15. Using the Mouse
  16. Using Voice
  17. E-mail and News
  18. Newsfeeds
  19. Chat
  20. Dialogs
  21. Backing Up Opera

Programs

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Choose which programs Opera should use to handle specific protocols.

Protocol Manager

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

Protocol Purpose
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.

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.

By default, Opera will use its own built-in source viewer.