What is a nonmanual marker? ASL sentence structure
facial expressions and body movement
signs that are drawn
all of the aboe

Non-manual signals or NMS for short (also, non-manual markers or NMMs) are grammatical and semantic features other than hands. They include mouth morphemes, eye gazes, facial expressions, body shifting, and head tilting. ASL sign for NMS. Non-manual signals are used to modify verbs, adjectives, and other adverbs." The answer to your question is all of the above. If I am incorrect then I apologize.

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it should be d im pretty sure hope i