Add
a sheen to any object’s fill or stroke. A sheen resembles a streak
of colored light across the surface of an object. You can adjust
a sheen’s color, size, angle, opacity, and position.
Select the object.
Select Sheen in the Title Properties panel.
Click the triangle next to Sheen and set its options.
Note: If the object’s texture obscures the sheen, deselect
the Texture option in the Title Properties panel.