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我们已经将每个部分转换为其艺术板上的一个符号实例，当你选择一个符号实例时 在画布中，你可能会注意到在检查器中，在符号选择器下有一个覆盖列表。 覆盖允许你编辑你的符号实例的一部分 – 所以他们保持了相同的基本元素 在你的符号中定义的 – 但允许他们有自己单独的内容，如包含 特定的文本，或你可能只需要出现一次的图像。 有几种覆盖类型会自动出现，这取决于你的层的类型。 符号包含，而且它们在检查器中按层组织。 如果没有重写，你将看到符号主站的默认值。
We have convert each section into a Symbol instance on its Artboard, when you select a Symbol instance in the Canvas, you might notice a list of Overrides in the Inspector, under the Symbol picker. Overrides allow you to edit parts of your Symbol instance – so they keep the same basic elements defined in your Symbol – but allows them to have their own individual content, such as containing specific text, or images you might only need to appear once. There are several override types which appear automatically depending on the type of layers your Symbol contains, and they’re organized by layer in the Inspector. If there are no overrides present, you will see the default values from the Symbol’s master.
