Important Points About Libraries

Listed below are some important points about the EndNote library.

You can create up to 999,995 references in an EndNote library. However, it is recommended that the number not exceed 50,000 to maintain efficient database performance.
There is no limit to the number of libraries you can create, assuming that you have the disk space to store them. We recommend that you keep all the references you cite in your papers in one primary library.
You can select default libraries to open automatically when EndNote is started.
You can open more than one library at a time.
Libraries created with the Windows version of EndNote can be used by the macOS version of EndNote and vice versa (see Transferring Libraries between Computers or Platforms).
Each library can be independently moved, copied, or deleted using the Windows Explorer. Always move, copy, or delete both the main .enl file and the .Data folder; otherwise, you can lose reference data.
Figures, Groups, and other significant files are stored in a [library name].Data folder which is in the same folder as your main library file. This folder is an extension of the library, so remember to move, copy, or delete the associated .Data folder along with the main library file.
Library filenames include the extension .enl. If your library filename does not include an .enl extension, Windows Explorer may not be displaying file extensions. You can change this setting in Windows Explorer if you wish.
If you wish to rename a library, it is best to save a copy of the library with the new name, then use the copy you created instead of the original library. When you are sure the new library is working correctly, you can delete the original library.
The Library window can be resized and the display font size can be changed.
The Reference List displays a multi-column reference list. This list can be customized to meet your needs.
The record number displayed in an EndNote record is not a permanent number. It will change if the record is copied between libraries, cut and pasted within the same library, or synchronized using EndNote Web/online.

Note: Changes made to the library you are syncing with EndNote Web/online can have consequences for your online library and any other EndNote libraries that are syncing to that online library. Do not move or rename libraries used with Sync. When syncing a library on a new computer, it is best to use an empty library to avoid creating duplicates of your references.

You can change the order of the fields, add fields, remove fields, or change the name of a field in the column headings of the Reference List display. See Display Fields Preferences for more information.