Have uploaded variable rate files to control box which is a kv tellus screen. The files have uploaded all fine, but how do I use the plus and minus seedrate option if I want to over ride seedrate map in certain areas? or if drilling gets delayed be able to blip seedrate plan up 10% etc? In manual mode the padlock button is pressed and I can blip rates up or down fine! As soon as variable rate map loaded the padlock icon wont unlock!!