1) When you have selected an off-screen unit, ESC should cancel issuing the order.
2) You should be able to use commands such as Y to unload at position, when deploying units (after the battle has started). It should be unnecessary to go back and find your units after you have deployed them to order them to unload.
2) You should be able to use commands such as Y to unload at position, when deploying units (after the battle has started). It should be unnecessary to go back and find your units after you have deployed them to order them to unload.