See Through Your DJI Obstacle Sensors? Yes!! 

You can see the view through your obstacle avoidance sensors on your DJI Mini Pro 4!
A fairly recent firmware update allows you to use the obstacle avoidance sensors as low-grade cameras. Great for filming those complex shots while moving backwards and sideways, and still keep an eye on where you're going!
This is called Vision Assist.
As part of the map and radar widget, you can swipe into the view from your sensors, pick a direction, and see where you're going. 360 degree views around your drone, all while keeping your main subject that you're filming in view!
Full disclosure: I found this out by accident. Only then, after playing with it for a bit, did I do a bit a research and realize it was recently added. Surprisingly, there seems to be very little content on RU-vid about this feature, so I hope this helps someone!
Used in this video:
- DJI Mini Pro 4
- DJI RC2 controller