Save changes
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¬  To save changes to a file, choose File from the main menu and then choose Save from the File menu.   ¬  To save changes in all the files open in Emacs, choose File from the main menu and then choose Save All from the File menu.

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¬	Save changes you make to a file so they're there when you next open the file. 

¬	When you choose Save, the contents of the current buffer replace the previous version of the file on disk.

¬	You should save changes periodically as you work on a document, not just when you're about to close it.

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See also

;SaveAs.rtfd;;¬	Save another version of a document