An active palm rest rounds out the modules, with a thumb-wheel and additional action button -- it's joined by a pair of (yet again) adjustable wrist rests that anchor along the bottom edge.

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BMW. Press a button on the steering wheel and it seamlessly switches from burning petrol to hydrogen.

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Using the Bluetooth button on the steering wheel, you can access the assistant.

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The company said at WWDC that it is working with car makers to have a button on the steering wheel to pop up Siri.

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Hamilton will drive on Tuesday, and Button is scheduled to take the wheel on Wednesday.

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While the Mobile Mouse has just the Start key and a scroll wheel, though, the bigger Comfort Mouse takes things a step further: the button there doubles as a capacitive surface you can swipe to toggle through open programs in Windows 8.

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We never really found ourselves using the thumb wheel in our first-person shooters, but you can think of it as a two-way rotating programmable button if you will, and it spins in small enough increments to find use as a weapon or ability switcher.

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