I have no idea how to use the pen tool.

我不知道如何使用钢笔工具。

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Here's where we break out the pen tool.

在此，我们使用了钢笔工具。

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Use the pen tool to draw reflections as shown.

按下图所示用钢笔工具绘制反射。

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LeapReader's a sort of spiritual successor to the company's Tag line, maintaining the reading tool's pen-like form factor, while adding writing to the equation.

ENGADGET

"For those working with our professional products, the pen is already their input tool of choice, " continued Tsunekawa.

ENGADGET: Wacom Inkling smart pen does drawing the old-fashioned way -- sort of (video)

Feedback is gathered using a markup pen tool to add notes and drawings on top of the work.

ENGADGET: Adobe brings Touch Apps family to Android tablets, Creative Cloud looms on the horizon