Final answer:
In assisting a resident up in bed, the pillow should be placed at the head of the bed to provide head and neck support.
Step-by-step explanation:
When pulling a resident up in bed, the pillow is typically placed at the head of the bed, behind the resident's head. This positioning supports the resident's head and neck as they are being moved. If the resident requires additional support or is at risk of acid reflux, the head of the bed might be elevated, and the pillow placement will be adjusted accordingly to maintain comfort and promote proper body alignment.