[RightDeve]

Actually there's a way, but rather tedious:

Deploy your troops as usual & save it, then load the scenario to actually play it. While playing the scenario (only 1 turn preferably) change the tanks facing using previous methods mentioned (you can also add smokes or any in-game elements). Save the gaming session. Open the save folder, and rename the saved files into SpScn format. Move those renamed files into the Scenario folder. Load the Scenario into the Scenario Editor, and then continue your scenario making process.

A saved game that is converted into Scenario automatically plays from turn 1 again, regardless how many turns you have played. But damages, terrain, facing, smokes, etc etc are recorded (actually continuing from that saved game, but now the Turn counter says 1). Even as far as I recall, retreat or rout status was retained.