There usually are no indicators of angle on larger dishes. You use an angle finder and adjust from there.Unless you have some receiver I have never heard of (highly possible) the receiver has no idea how many lnbs/lnbfs you have. Are you sure you are not referring to the DiSEqC port indicators? The
C Band portion of the lnbf is port 1 or a and the Ku is port 2 or b. You need to have the jumper in place for this to be operational.
As to 0 it really is irrelevant. Basically if the "box" area of the lnbf is at roughly 4:00 when facing the dish you are close to 0. You need to set skew according to the sat you are trying to receive.