I may be mistaken but when a new Endnote library is created the terms list is stored in the .DATA folder corresponding to the library. However, for users, accessing the terms list file should be done from the Endnote toolbar*.
You can export the terms list from each library and save each as a backup file copy. Since the exported terms list files are text files (.txt) you could also use a program like Microsoft Excel to combine the terms list from different libraries into one term list, sort the list, make changes, and remove duplicates. When completed, save the file as a text file, delete the existing term list of an Endnote library and import your consolidated/personalized term list.
So you could create, select, and use a single term list across libraries if you wish to do so.
*Go to the Endnote toolbar and select Tools >Open Terms Lists >Journal Terms List. Click on the “Lists” tab to access the options for importing, exporting, updating, etc. (Refer to attached image)
