He pulled what remained through the airlock, then stabbed virtual buttons.

She stabbed at virtual buttons with a single forefinger.

But instead of using a mouse or a physical keyboard, the iPhone uses virtual buttons and controls that appear on its screen.

The Lightglove, a computer controller that uses light to create virtual buttons and control the cursor, makes the hand more powerful than ever before.

The images are sometimes ghostly, and players can sometimes discover themselves pushing their fingers right through virtual buttons.

Her sculptor's fingers tapped a series of glowing virtual buttons.

You're meant to change your camcorder's settings by touching virtual buttons.

And pushing the virtual buttons invariably jiggles the camera.

I played the game on the iPad, and the virtual buttons were placed perfectly, and felt responsive.

Now, this could be a virtual button.