Hi nycellist, Welcome to EasyEDA. Sorry but it is not possible to give a useful answer to your post without more information. Please give us some more information about your question. In the meanwhile here are some links that may help you: <https://easyeda.com/Doc/Tutorial/creatingtheSchematicLibs.html> <https://easyeda.com/Doc/Tutorial/spiceSimulation.html#h.62i6bydbsl9u> <https://easyeda.com/Doc/Tutorial/creatingThePCBLibs.html> <https://easyeda.com/Doc/Tutorial/prefixesandPinNumbers.html> Also, note that double clicking on any part in the **EasyEDA Libs**, the **Through Hole** and **Surface Mount** parts (under **General Packages**), or clicking **Edit** on any part found using **More Libraries...** or **Shift+F**, will open a copy of those parts for editing which you can then save into **My Parts**. :)