You can do this via GeoPard:
1) Sync boundary from Ops center into GP https://docs.geopard.tech/geopard-tutorials/product-tour-web-app/john-deere-operations-center-integration/4.-import-into-geopard-from-john-deere-operations-center
2) Edit boundary in GP (add any layer as a background for accurate editing) https://docs.geopard.tech/geopard-tutorials/product-tour-web-app/getting-started/edit-a-boundary
3) Send the edited boundary back into the Ops center https://docs.geopard.tech/geopard-tutorials/product-tour-web-app/john-deere-operations-center-integration/7.-export-field-boundaries-into-john-deere-operations-center


You can do all this under a free trial.