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
    • General Preferences
    • Wand Preferences
    • Searching in Opera
    • Web Page Preferences
12. Advanced Preferences
    • Tabs
    • Browsing
    • Notifications
    • Content
    • Fonts
    • Downloads
    • Programs
    • History
    • Cookies
    • Security
    • Network
    • Toolbars
    • Shortcuts
    • Voice 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.

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