Change default source viewer in Opera 10

When you visit a web page using the Opera, you can see the source code of that web page by right clicking on it and selecting Source. By default, the source code is opened in the internal source code viewer of Opera. But you can change it to whatever text editor you want. Here is how :

  1. Start Opera.
  2. From the top-left menu choose, Settings → Preferences to open the Preferences window. You can also press the key combination Ctrl + F12 to bring up the Preferences window.
  3. Browse to the Notepad++ executable and click on the OK button in the Source viewer window.
  4. Close the Preferences window by click on OK button.