What does the word ae mean when it appears on the DJI drone flight interface?

AE lock, that is, exposure lock. In auto mode, if you activate AE lock, the exposure value will remain unchanged. The brightness of the picture will change with the change of ambient light, and the device will no longer automatically adjust the brightness of the picture. AE lock (automatic exposure lock) In the upper right corner of the image transmission interface, click the icon to turn on/off exposure lock.