Hi Guys, it is strange for me as well. So I did some investigations. It seems that all real Boeing NDs draw the double green circles on FL 100 even the 777 (I checked videos for 777, 747). So it should be implemented for pmdg 777 as well I think.
PMDG 777 is a fantastic development I hope it will be fixed soon to be the same as the real one!
3 * B777 NDs photo. All have the green circles at FL100.
https://www.dropbox.com/s/f1yumn3u6an6ipl/777%20has%20decel%20circles%20FL100%202.jpg?dl=0
https://www.dropbox.com/s/ulhxgvqr7ibvkfn/777%20has%20decel%20circles%20FL100.jpg?dl=0
https://www.dropbox.com/s/m7uoc7pjk0e8dkk/777%20has%20decel%20circles%20FL100%203.jpg?dl=0
Please, write if I am mistaken. I am really interestin on this topic.
I cannot see any sences why Boeing would not apply this only on T7.
Regards, Balazs