有一些旋钮在上面，用来调节显示器亮度，对比度，颜色以及屏幕大小和位置等。

On the monitor, there are some knobs which are used to adjust its lightness, contrast, color and the screen's size and location, etc.

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在每个游戏转向旋钮六种操纵旋钮；你可以安装在方向盘上的四个可能的位置。

Steering knobs - six different steering knobs in each game; you are able to install them at four possible locations on a steering wheel.

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将旋钮旋转到全闭的位置，然后旋回到全开的位置，测试是否旋转灵活。

Rotate knob to full-closed and back to full-open to test for free rotation.

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