Replace All...

  Choose Replace All...  to replace all occurrences of the text
  string in the Notepad editor window.  A dialog box appears.

  Type the string you want to replace in the text entry field
  labeled Old.  Enter the new string in the text entry field
  labeled New.  Click on the OK button.

  Additional topics:

  *   Next Selected

  *   Previous Selected

  *   Next...

  *   Previous...

  *   Next Incremental...

  *   Previous Incremental...

  *   Replace Once...

  *   Replace Within Selected Area...