

Leave the Size From drop-down menu set to Width Slider.In the Effect Controls panel, start at the top and set the Anchor to -1, 0 (a negative value for X was chosen so the edge is just off the left side of the layer solid).Press T to open the Opacity setting of the solid and change the value to 21%.Press S to open the Scale parameter, click on the chain to unlink the proportions, hold down Shift and scrub on the X parameter to the right, until it covers the composition edge to edge.


