Non-manual markers are only present when the manner meaning is expressed by free relative clauses. In these sentences, the non-manuals are the same marking free relative clauses, namely, squint eyes (sq), raised eyebrows (re), head nod (hn) and eye blink (eb).
The non-manual marking squint eyes is obligatorily produced over the entire manner clause, raised eyebrows is optionally produced over the sign how. The non-manuals head nod and eyeblink are obligatorily produced at the end of the manner clause and before the main clause.
eb
hn
sq
ix2 explain how rice ix1 cook done
‘I cooked the rice the way you explained to me.’