在JSF生命周期的第一个阶段——恢复视图——中，会有一个来自FacesServlet控制器的请求。

In the first phase of the JSF lifecycle — restore view — a request comes through the FacesServlet controller.

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当没有选择这个操作时，就会从Display中删除这个过滤器，恢复编辑器和视图标签的默认拖放行为(这意味着又可以进行重新排列和平铺操作了)。

And when the action is unselected, the filter is removed from Display, restoring the default drag-and-drop behavior of Editor and View tabs (meant for rearranging and tiling).

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你可以使用视图菜单中的撤销按钮取消任何已经完成的设置，或将设置恢复成初始状态。

You can use the Undo button in the view menu to discard any changes, and reset all changed Settings back to the previous states.

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