It would make sense to have two separate toggles then:
i) "Allow Firing" (Yes/No) as a way to force colonists to hold fire.
ii) "Automatic targeting/Manual targeting" - or "Automatic targeting" (Yes/No) - to switch between the two targeting types. Going from manual to automatic targeting would require clicking this toggle. Since going from automatic to manual requires having a manually-set target, trying to unclick the automatic targeting toggle would produce a notification such as "must select target". So to go from automatic to manual would require manually setting the target, whereupon the automatic target toggle would automatically change in accordance.
i) "Allow Firing" (Yes/No) as a way to force colonists to hold fire.
ii) "Automatic targeting/Manual targeting" - or "Automatic targeting" (Yes/No) - to switch between the two targeting types. Going from manual to automatic targeting would require clicking this toggle. Since going from automatic to manual requires having a manually-set target, trying to unclick the automatic targeting toggle would produce a notification such as "must select target". So to go from automatic to manual would require manually setting the target, whereupon the automatic target toggle would automatically change in accordance.