Is it possible to add color on the intersection between the section box and the model? I would like to have more control over ambient occlusion.
Not yet - but that is already something which has been requested before, so I’ve gladly forwarded your feedback as well. Although I’m not 100% sure how this would help with controlling ambient occlusion? 
you can gladly briefly elaborate on that for better understanding, this way I can forward that additional feedback as well.
Sorry, one request is for the section box, the other one is to control AO
Ah, I see! Something particularly missing or something particular you want to adjust at the moment when it comes to how our AO is displayed? Maybe you experienced some problems with it?