The carrier's panel should be anywhere from the child's shoulder to the base of the child's ear (like shown in the image below). For an older compliant toddler/preschooler, the carrier can be as low are the base of their armpits. The higher the panel comes (no higher than the child's ear), the more supportive the carrier will feel. If you are wearing a newborn or baby who likes to lean backwards, you will want the panel to come to the base of baby's ear. This allows the child to see around, but offers maximum support and safety. To adjust the panel:pull down on the height adjusters (webbing at the bottom of the body panel) to shorten the panelloosen the height adjusters (webbing at the bottom of the body panel) by pulling up on the plastic piece to lengthen the panelthe seat will automatically adjust to fit your child knee-to-knee