The last step designing a part in Eagle is to combine our package (or packages) with our symbol (or very rarely several symbols), which results in something called a 'device' in Eagle.
Creating a New Device
Creating a device is done exactly the same way we created a new package and symbol: Click on the dedicated 'Device' icon in the library editor toolbar ...
... and enter a unique name for our device ('GA1A1S202WP' in this case):
This will open up the device editor with our new device, and you should see something similar to the following screen:
