1. Toolbars
2. Menus
3. Panels
4. Speed Dial
5. Bookmarks
6. Widgets
7. Notes
8. Content Blocking
9. Fraud Protection
10. BitTorrent
11. Display Modes
12. Developer Tools
13. Preferences
    • General Preferences
    • Wand Preferences
    • Searching in Opera
    • Web Page Preferences
14. Advanced Preferences
    • Tabs
    • Browsing
    • Notifications
    • Content
    • Fonts
    • Downloads
    • Programs
    • History
    • Cookies
    • Security
    • Network
    • Toolbars
    • Shortcuts
    • Voice Preferences
15. Skins
16. Keyboard Shortcuts
17. Using the Mouse
18. Using Voice
19. E-mail and News
20. Newsfeeds
21. Chat
22. Dialogs
23. 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.

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