Does APAS 4.0 work when in cruise control ?

How useful it is to read the instructions, then such questions do not arise)
The answer is yes.

Cruise Control is available in Normal, Cine, and Sport mode, and the function can be enabled in APAS.

Hi there. Thank you for reaching out. APAS is only disabled when using Intelligent Flight Modes. It will be enabled automatically once the aircraft exits Intelligent Flight Modes and when recording at a high resolution such as 1080p 120 fps, 2.7K 48/50/60 fps, or 4K 48/50/60 fps. If you need the User Manual, you can get it from here: https://dl.djicdn.com/downloads/ ... _Manual_v1.6_EN.pdf. Please let us know if you need further assistance. Have a great day ahead.