Has anyone deleted a pin from a part in Eagle?

Hi!
I read somewhere that arduino users draw the circuitdesign with Eagle. I downloaded and started. I found that I couldnt find the Arduino board in the partlist. Maybe there is an additional library to download? But I looked at how to modify already existing parts, like the one in the picture. Has anyone tried to delete a pin from an existing part? and want to show how it is made?

What is the problem with the pin in the existing part? Why do you want to delete it?

Pins are usually assigned. You must unassign pin to unlock deleting.

What Im trying to achieve is a pinmapping of the Arduino Uno Rev3 for Eagle. There is none of it in the Eagles partlibrary. I found a zipfile for the module here in Arduino´s boardgallery, but no pinmapping what I could see. It was a more detailed circuit (made for Eagle) of the Uno´s inside.

Get layouts for Arduino boards here;

https://community.element14.com/products/eagle/

Thank you. It was more to it. I downloaded a zipfile from https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbTdyQ3E4YnJ0aUpIdXcyZjdCMFN1SGFjbE5mQXxBQ3Jtc0tuNGlpUnNtNXRXc2l5bDQ1ZEVkSEU2V1E3bmU2MWFYWWhfcjJZQUtac0dtUy0wRGRYY1U3Tl9hcTNmREhnZDBWNFFzdW10TkphQkUwcm5KODBsa3ZsSUZ2dEV0dzdGZlZFdFFhbU5WcXFoTFBRTjRzdw&q=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-Eagle-Library%2Fzipball%2Fmaster

and then put it in the library map for Eagle, then extracted the zip there. After that opened "add part". Under "adafruit" scroll down to Arduino and pick the suitable layout.

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