I've got 12 subfigures in total, 4 rows and 3 columns.
I'd love to display two captions, each is for 6 images.
In short, I'd love the figure be displayed as:
Can anybody help to give me a hint?1 2 3
4 5 6
(a)
7 8 9
10 11 12
(b)
Figure: XXXXX
Best Regards
JIA