然后选择wires键，顺着这个页面的顶端启用这个配线工具(图20)。

Then select the Wires TAB along the top of the page to launch the wiring tool (Figure 20).

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创建一个新层,在画布顶端用“长方形”工具化一个50px高的长方形,就如图所示，这个长方形是用作导航的.

draw a 50px high rectangle in the top part of the canvas, just as shown in the image. This will be used for our navigation.

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使用渐变工具，设置黑色到0%不透明的渐变，从画布底部向上点击拖拉渐变到行星位置，然后，从画布顶部点击拖拉渐变到行星顶端。

Using the gradient Tool (g) with a Black to 0% opacity gradient, click and drag a gradient from the bottom up into the planet for the bottom and from the top down for the top of the planet.

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