你也可以通过使用工具栏上的导航按钮来操作浏览图。
You can also navigate through Browse diagrams by using the navigation buttons on the toolbar.
在每一个视图中，使用视图顶部的导航工具栏中的按钮，您可以返回。
You can go back, in each view, using the button in the navigation tool bar that is on the top of the view.
现在保存并重新启动Firefox，如果右键单击这两个按钮并选择Customize，就可以将它们放到导航工具栏上。
If you save everything at this point and restart Firefox, you can drag the buttons onto your navigation toolbar if you right click on each of them and select Customize.
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