Overlay two expressions:

Overlay two graphics:

Overlay many objects:

Overlay two-dimensional and three-dimensional graphics:

Overlay text and graphics:

Use a nondefault ordering:

Allow clicks in the back layer:

Overlay with a single element is similar in behavior to a PaneSelector:

Make a new character from existing characters:

Watermark an output:

Create an image map using invisible controls overlaid onto an image:

The controls create a photorealistic, fully functional numeric keypad:

Expressions in front may completely obscure expressions behind them:

Using transparency or removing background colors might achieve the desired appearance:

Overlay prevents tooltips not in the active layer from firing:

Use the third argument to specify the layer where tooltips should be active:

Use Overlay to make a fading transition effect:

Create a decorative frame for a 3D object which can still be rotated: