Both Uses

highlight
in
The Lovely Bones
(Edited)

The blush highlighted the hollows beneath her cheekbones ("The hollows that could stand some more hollowing," our grandmother pointed out).
Chpt 9 *

highlighted = emphasized (called attention to)
They smoked cigarettes and looked at each other as if they had suddenly and without preparation moved on to a new page, where the pressing business had already been highlighted for prompt attention.
Chpt 12 *

highlighted = marked as important

Definitions:

(1) (highlight as in: highlight the main findings)
emphasize (call attention to something)
(2) (highlight as in: highlights of the year)
something that stands out
(3) (highlight as in: highlights and shadows)
noun: something that is lighter and draws attention -- such as an area of a painting

verb: making something lighter -- such as an area of a painting
(4) (highlight as in: highlights in hair)
noun: a strip of hair that is lighter

verb: making strips of hair lighter
(5) (highlight as in: highlights with a yellow marker)
to mark important text; or something that is marked to draw attention to it -- as with a felt-tip pen with a bright, transparent ink
(6) (highlight as in: highlights the text and deletes)
select (on a computer screen)
(7) (meaning too rare to warrant focus)
The form highlighter, can also refer to a type of makeup that draws attention to parts of the face.