Outline

Add an outline on all objects of the layer having the effect. This won't work well if shown on top of the background color of the scene. Be sure to use an object acting as a background or a floor.

Set the Thickness and the Color of the outline. When the effect is applied to a single object, this is a common way to highlight it — for example the currently selected item or an interactive object the player can click.

Reference

All effects are listed in the effects reference page.