In Listing 6, I snuck in another useful navigation element that I have not yet mentioned.

在清单6中，我悄悄地引入了一种还没有提到过的非常有用的导航元素。

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The Firebug layout TAB displays more information, such as padding, offset, and other relevant measurements. The layout window in Figure 8 shows the measurements of a navigation element.

Firebug Layout选项卡显示了更多的信息，比如间隙、偏移和其他相关的量度。

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Users can modify the side navigation to edit the color scheme or element layout or to add entries.

用户可以修改侧边导航栏，如编辑配色方案或元素布局，或者添加条目。

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Technically a team event that includes an element of navigation, the term adventure racing has now grown to describe any race using two or more disciplines, such as running, biking or kayaking.

BBC: A finish line few will cross