Find the Footprint in the library either by searching for the exact name of the symbol n your schematic that it is associated with or by searching for the exact name of the Footprint. Double click on the preview image of the Footprint in the library tool which will open it in the Footprint Editor. Edit it. Save it with a unique name and a clear Description. In your schematic, edit the name of the Footprint assigned to the symbol to that of your new symbol. Do Update PCB... For more information please read the Tutorial (1) and How to create findable footprints and searchable symbols (2.3) in (2) in: https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a