This tutorial may help you to figure this out:
I don’t normally use parts editor, rather edit the underlying files which this describes.
edit:
Here is a part for the DFR0745. Feel free to post the .fzpz if the ESP gives you problems and one of us can fix it up for you.
dfr0745.fzpz (16.8 KB)
Note the part has a bus (an internal connection in parts editor) on the two ground pins and the mounting holes in pcb are only on silk screen. If you want mounting holes in the sketch drag the hole part over the hole in silkscreen to drill the hole. The reason is you can add the hole in the sketch, but you need to modify the part to remove the hole if it is in the part.
Peter