Firing volleys vs. 'at will'

[Alpedar]

I didn't meant behind hill. I mean on top of "hill" and melee troops infront of them little lower. I hope that this way straight flying bullet can fly just above heads of protecting units when enemy is far (once they are realy close, this will not hold)

[Barbarian]

Oh, clear. Yes, the units which are lower than musketeers won't be harmed, just I am never sure how much lower exactly must they be. But even one of the historical battles in Medieval2 starts with pikemen lines, and musketeers behind them, on a higher ground.

I just would like to know clearly, if mounted musketeers can shoot over the lines of infantry. I guess, they can.