Aim Mode not working?

[TenchiFreak5]

Am I correct in assuming the "Secondary" input is supposed to enable it? I initially thought that was what it was supposed to do so made sure it was set to Mouse 2 like in 1964, but nothing I map to that control seems to do anything.

[D6]

Just play the first few seconds of the first missions, you'll get to a short tutorials that unlocks the aiming.

[TenchiFreak5]

I figured it out a bit after. I was confused because it was working in the other modes and got turned around trying to find out what was going on.

[Syncourt]

This confused and worried me too for the first 30 seconds.
Easy enough to figure out, but IMO never a good idea when games lock basic controls just for tutoral purposes.