In general, the following two rectangular images only appear for articles and events that appear in the spotlights and don't have images, because the spotlights look odd without them. So they don't appear on the news or events page when there isn't an image. In other words, there's no need to add these two images to the "field" as a backup option. We only do that for personnel (see square image below).
Arch 375x250 (for Spotlight placeholding)
Arch detail 375x250 (for Spotlight place holding)
Personnel Image Field
In general, this is only used for Personnel image field when there isn't an image field. This must be added.
Arch 400x400 (for Personnel images)