How hold mask during bag mask ventilation of child?

During bag-mask ventilation of a child, hold the mask with your thumb and index finger in a "C" shape around the mask, ensuring a tight seal over the child's nose and mouth. Use your other fingers to lift the jaw upward (the "E" position) to open the airway. Maintain this position while delivering gentle breaths, being cautious not to over-inflate the lungs. Ensure that the chest rises with each ventilation to confirm effective air delivery.