Following someone else's work can be challenging! Are the words hat, mittens, scarf, coat, etc in print? If they are part of the TN (in other words, they are naming pictures that are on the page) then the TN uses margins 7-5 and I could see why they might do the 'picture' in 7 with each 'label' in 5. They could also just be done as a run-on list: Pictures: hat, mittens, scarf, coat. If the actual words are in print, then the list is a better option. I would then suggest that the TN say "Pictures: listed below" and put the words at the margin. There is no specific rule about this. Choose a format and be consistent.