Originally Posted by
JohnGreat
I thought someone mentioned before the middle seats in PY can be raised

Originally Posted by
chfshifter
Yep. IIRC just the ones between E and F though.
They can (at least on some aircraft like the 747). It's actually possible to lay down flat using three seats (torso in the EF seats, knees raised over the armrest, legs in the D seat) - I had a snooze on a HKG-PVG sector that way. It wasn't the best, but wasn't terrible either.