Inner Glow?

[iamtheblues]

Something that has puzzled me lately is that it doesn't seem possible to create a drop shadow glow that only affects the interior of a shape.
I understand that by cloning the original shape without a glow and placing it on top and adjusting its size gives the desired effect, but this seems a rather long-winded way of going about things.
Anyone know of a shortcut?
Saludos,
Bob.