Vantage Question

[XvArawnvX]

I can’t remember if it’s with other mid to long range scopes or if it’s just her ultimate but, the horizontal dots how do you use those or what purpose are they for and how do I properly use them I understand the vertical dots and I’m assuming they are for moving targets? I can’t for the life of me understand them please help.

[XvArawnvX]

I understand the vertical dots are for how many meters the are away so my question is for the horizontal.