What does it do if anything? I notice that there is an entry for it on under the effects or exits section of the aircraft config. Please help, thanks.

Just guessing at the moment but perhaps a stairway unfolds or something. SOmetimes these commands are used for various other things. (I thought on the Aerosim B727 that command made back stairs appear but I can't recall exactly)

I meant on the L1011. What does the wing fold feature control if anything?

nothing...