[Mobhack]

There is the Unit View button, which highlights all hexes a unit can see from its current hex. (may only be for full game?)

But there is no way to select a random hex X,Y and do the equivalent. You therefore have to rely on your own map reading skills and intuition to figure out if moving to hex X,Y is going to have the required field of view. Just like any officer has to with his map-reading skills.

The mini-map uses different colours for height levels, and so can give a general overview of terrain, but at 1 pixel per hex resolution.