How can use the artillery support for smoking? I can not find that option

I have checked the setting ,It said I need enter R when I want to change the type of artillery,but it useless. So please help me about that .Thanks !

what campaign are you trying it on?

Probably not Tunisia I can tell you that much

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It’s currently only avaiable in Tunisia for test purposes.

Same for using a spade to dig.

I think the command key is β€œR” to switch between HE and smoke. If I recall correctly, I hit the key by accident and figured it out. Not sure if it is only Tunisia though.