Hello!!! Question about finger movement

[Dali balti]

Hello everyone!!!!!!
Happy to post my new questions!!!!! lol
> So, my question is: how to differenciate using "v" in changing the handshape, and is it necessary to write the new handshape if it is not clear enough??????
in other words, the black point or the "v" knuckle shape, once they are on the fingers, does it mean that the movement is for all the fingers, or just for the finger/fingers on which the point/v is put??????