I see in a drone book I got from the library that there is a mode 4. It seems like the logical setup for me. Wondering why it is not included in the configurations offered.

Hi there. Thank you for reaching out. I will take this as a suggestion of yours and will forward it to our designated team for attention. After the engineers' evaluation, significant suggestions or requests will be implemented via the firmware update, app update, etc. For any updates, please stay tuned to the latest news on our DJI official website at www.dji.com. Thank you for your understanding and support.