[Epoletov___SPR]

For example.
You Mortar is aimed in "Bombardament menu".
Its shots: X:X:X.
Now press button "Z" and shoot a smoke.
Further, we look in "Bombardament menu" and it is visible that we can to aim ours Mortar there-where we have shot having pressed button "Z".

Conclusion: it is easily possible to change a target for artillery which will shoot in following Turn with delay = 0.1.