Why don't i see any AF points through the lens except one? The D610 is in AFC , D9 in A priority mode? I also have it set on AE-L AF-L button set AF on
If I depress the AF button the points do appear.
In that mode, the point you see is your main focus point. You can move it around with the selector if its not locked. The other points assist if the subject moves. This article explains it better: https://photographylife.com/dslr-autofocus-modes-explained