Close
Click the File | Close command,
the document tab 
button, or the document
control close button to close the active window. If you have not saved
the current changes, you are prompted to save changes before the window
closes.
Yes
Click Yes to save changes and then close the window. If the file has not been previously saved the Save As dialog will appear.
No
Click No to close the document without saving changes.
Cancel
Click Cancel to return to the active document window.