Final answer:
In neck procedures, a roll should be placed transversely under the neck to maintain alignment and facilitate anesthesia and surgical access.
Step-by-step explanation:
For neck procedures, you should place a roll transversely under the patient's neck. This position helps in maintaining proper alignment of the neck and facilitates anesthesia management as well as surgical access. It is important that the roll is not too large or too small, as it must provide adequate support without causing hyperextension or excessive flexion of the neck. Ensuring patient safety and comfort is paramount during any surgical procedure, and correct positioning can aid in this as well as potentially reduce the risk of post-operative complications.