The manual and options both refer to a "Grab" key (Z) and for the life of me I couldn't work out what it did.
It wouldn't activate things. It wouldn't perform wrestling moves in unarmed combat etc etc...
And then I hit it by mistake whilst looting the fallen body of an annoying bandit. Suddenly the corpse had moved. I had dragged it across the ground.
Playing about I found I could move things much more precisely using Grab, than the old pick up and drop routine, which scatters things around you.
This definitely has potential!