foinaven - I hope highlighting isn't considered wrong, because that's what I did! I also added a border as much as I could around each item and utilized 2 highlighter colors to separate adjacent items. As a bonus I wrote the names of the 7 items in the margin of the paper so there could be no doubt that I found them.
However, I am new to Listeners and curious what others think since the question of "how strict are submission guidelines" has crossed my mind multiple times. I frequently add a few "extra" details in the margin even when not explicitly asked to submit the information to "prove" that I found it.