Opera Software
  1. Toolbars
  2. Menus
  3. Panels
  4. Speed Dial
  5. Bookmarks
  6. Opera Widgets
  7. Notes
  8. Geolocation
  9. Opera Link
  10. Opera Turbo
  11. Opera Unite
  12. Content blocking
  13. Fraud and Malware Protection
  14. BitTorrent
  15. Display modes
  16. Developer tools
  17. Preferences
  18. Advanced Preferences
  19. Skins
  20. Keyboard shortcuts
  21. Using the mouse
  22. Using voice
  23. E-mail and news
  24. Feeds
  25. Chat
  26. Dialogs
  27. Auto-update
  28. Backing up Opera

Programs

Settings > Preferences > Advanced > Programs

Press Page Down and Page Up to switch slides

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
mms Choose which application Opera should use to display MMS streams
rtsp Choose which application Opera should use to display RTSP streams
mailto Choose which application Opera should use for email; Opera's own built-in client, the default email client on your computer, or a specific other email client.

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 Page > Developer Tools > Source or press Ctrl+U to see the source of a webpage.

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