We have successfully scanned maps and calibrated onto our farm site. We have imported yield data and all was done successfully. When we decided to calibrate another map for another field we did not remove the previous map. therefore, when loaded up it overlapped the previous map. We then used the backdrop tool to remove the previous map, but the soybean legend did not remove from the screen along with the ASCS scanned map. Now I can't remove just the outlined soybean portion of the field from the screen. How do I do this?