Assume the yellow magnify glass logo is the hot spot to get exposure value. How do you make it appear/disappear for video? How do you move it to different spot? Sometimes it’s there. Sometimes not. Tried moving by placing finger on screen but only got blue follow circle. Also is there a DJI GO manual?

When you set in M exposure mode, the metering will be disabled and the yellow magnify glass logo will disappear. In Auto mode and A mode, you can press the yellow circle on the top left corner, the metering will become AF, but the green frame is still there.
Sorry that there is no user manual of DJI Go APP.