项目管理 → 项目跟踪 → 我未完成的任务 → 选择对应项目

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单击右键 → 点击项目任务树

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在弹窗中选择对应的任务 → 单击右键 → 增补子任务

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选择对应的任务 → 确定

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下一步

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下一步

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完成

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即可完成子任务的添加

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增加的子任务会受到上级任务的前置任务、后置任务的约束