Unfortunately, no one can be told what the ShapeSheet is. You have to see it for yourself.
Visio SmartShapes can be so much more than just clip-art. This is because the ShapeSheet allows shapes to behave in intelligent ways, carry data and react to that data.
One under-used, little-known function is RAND(), which allows you to add randomness to your drawings. Randomness can not only be “neat-o”, but also useful. Come in and see why!