A highlight box is a special type of object that's used to draw attention to a specific part of an image or slide. Let's add a highlight to this slide, drawing attention to the tablet in the image.
Now that the highlight box's appearance has been customized, we can more easily see the effect of the highlight box on the stage.
(Optional) Check the Fill Outer Area checkbox.
By default, the highlight box will dim the area within it using the fill color we set. If you'd rather dim everything except what's inside the highlight box.