To close a library, do one of the following:
From the File menu, select Close Library.
Type Ctrl+W or Ctrl+F4
+W when the Library window is active.
Click the Close button in the top right left corner of the Library window.
Hold down the Option key when clicking the red close button of a library to close all open Library windows. Type Ctrl+Shift+W to close all open libraries.
EndNote automatically saves the information in your library when you close each reference. As a result, closing the library does not invoke the familiar "Save changes?" question. Instead, the Library window disappears as all changes have already been saved.
Closing a library does not quit the EndNote program. If you want to quit from EndNote, select Quit EndNote X7. Exit from the EndNoteFile menu and any open libraries are saved and closed automatically.