# Merge two endnote libraries

**URL:** <https://community.endnote.com/t/merge-two-endnote-libraries/290231>\
**Category:** EndNote How To\
**Created:** [April 13, 2010, 7:35pm UTC](https://community.endnote.com/t/merge-two-endnote-libraries/290231 "2010-04-13T19:35:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![roberto](https://avatars.discourse-cdn.com/v4/letter/r/8baadc/32.png) [@roberto](https://community.endnote.com/u/roberto)\
**Post date:** [April 13, 2010, 7:35pm UTC](https://community.endnote.com/t/merge-two-endnote-libraries/290231/1 "2010-04-13T19:35:46Z")

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Can someone let me know how to merge to EndNote libraries?

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**Author:** ![emilyatchemlib](https://avatars.discourse-cdn.com/v4/letter/e/ecd19e/32.png) [@emilyatchemlib](https://community.endnote.com/u/emilyatchemlib)\
**Post date:** [April 15, 2010, 2:26pm UTC](https://community.endnote.com/t/merge-two-endnote-libraries/290231/2 "2010-04-15T14:26:18Z")

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From En X3 help:

Merging Libraries

There are three ways to merge libraries: import one library into another, copy references from one library to another, or drag-and-drop.

Any time you add references to a library, the newly added references are assigned new record numbers in the order that they are added to the library. This means that a reference that was #23 in a smaller library, could become #600 in a larger library. As a result, you cannot use the larger, merged library to format papers that have citations with the older record numbers.

Note: Before merging libraries, it is a good idea to make a backup copy of the library into which you are transferring references.

Tor previous versions, see your&nbsp; EndNote help manual.