is it possible to edit  the waypoint on the computer?

Yes if you are using Litchi you can.
https://flylitchi.com/hub

At the moment DJI’s WP 2.0 do not support a real offline Modus ....

Is there a separate file for each mission and can it be read by humans?  Exported, edited and reimported?

MavSpa_user Posted at 2-3 00:46
Yes if you are using Litchi you can.
https://flylitchi.com/hub

Dji has not released SDK for SRC so Litchi not available yet .

hallmark007 Posted at 2-3 08:42
Dji has not released SDK for SRC so Litchi not available yet .

Thank you for the information.

flypanda Posted at 2-3 10:52
Thank you for the information.

Yeah I got an email from litchi on Thursday to say dji hadn’t released SDK, but if or when they do they’ll update for SRC.

hallmark007 Posted at 2-3 08:42
Dji has not released SDK for SRC so Litchi not available yet .

Ohh. I answered the question, didn't read good enough that is was for the new controller, sorry guys

Hi there, thank you for reaching out and we really admire you being interested in using the DJI. About your question as of the moment waypoint 2.0 don't support the offline mode and we don't have any information yet from our developer if this feature will be supported. If ever will be supported this will be posted on our website especially on the release note of the Product. Just keep in touch. Thank you for your support.