This prototype was tested in the Chrome web browser on Microsoft Windows 10. The left mouse button should allow you to raise, move, and resize windows. Holding down Ctrl and then clicking with the left mouse button should trigger teleportation of a window to the foreground layer (shown with the orange border), or dismissing a window to the background. When the foreground layer contains one or more windows, holding down Ctrl and then holding down Alt should cause the foreground layer to become transparent, allowing you to interact with windows behind the foreground layer.

Pressing and releasing the Alt key by itself, without Ctrl, can cause keyboard focus to be transferred off the webpage, preventing the prototype from working properly. If this happens, to return keyboard focus to the prototype, press and release the mouse button on the webpage, and avoid holding down Alt without first holding down Ctrl.