Creating a New Library
Prompt to Create a New Library: When you first open EndNote, you will be prompted with the option to "Create a new library." Click on this option to start creating your new library.
Alternative Method:
Opening an Existing Library
Click on "File" in the menu bar.
Select "Open Library" from the drop-down menu.
Choose Your Library: Navigate to the location of your existing library file, select it, and click "Open."
By following these steps, you can easily create a new library or access an existing one in EndNote 21.