To replace all occurrences of a text string in all project files with another text string: 
 
 -   Open the Find menu and click Find in Files.  
   
   - On Windows, you can instead press Ctrl-Shift-F. 
- On Mac OS X, you can instead press Cmd-Shift-F. 
 
-   In the Find box that appears below the editor, type the text string you want to find.  
-   (Optional) In the box to the right of the find button, enter a pattern for the filenames you want to match. Several patterns can be separated by a comma, and files can be excluded by beginning a pattern with a minus sign.  
  
   By default, all files are matched except those whose names begin with a dot. 
   
-   In the Replace With box, to the right of the Find box, type the string with which you want to replace the found text.  
-   Click Replace.