If the designer is not already open, you can open it in the alter mode using the context menu option open Definition, available on the table object.

如果尚未打开设计器，可使用在表对象上可用的上下文菜单选项open Definition以更改模式打开它。

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For example, when you add a new index, you must modify the object definition to specify the table to which the index applies before the index definition is valid.

例如，当您加入新的索引时，必须先修改物件定义来指定套用此索引的资料表，该索引定义才会变成有效。

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