This is counter to the recommended workflow of EasyEDA. If you start off by drawing a schematic and assigning the appropriate package to each symbol in the Schematic Editor (including any holes such as mounting holes etc.) then when you first do **Convert Project to PCB...**, those footprints will be pulled into the newly created PCB from the library. If you find that you need to modify a footprint then search for the original from the library, clone it, edit it (and add or edit the description) then save it with a unique name. Next, assign this new package to all the symbols in the Schematic that called up the original version and then do **Update PCB...** from the Schematic Editor or **Import Changes...** in the PCB Editor. * All the relevant packages in the PCB will then be replaced by the new ones. Job done. For more on this please refer to: https://easyeda.com/Doc/Tutorial/Introduction.htm#Design-Flow-using-EasyEDA https://easyeda.com/forum/topic/The_best_way_to_design_a_PCB_in_EasyEDA-ThR3pwqIC and: https://easyeda.com/forum/topic/How_to_assign_or_change_the_PCB_footprint_assigned_to_a_schematic_symb_-1SoiAuM4Y