属性集应该类似于共同的HTML编辑属性，就算是一个新用户也应该可以快速地管理它们。
The property set is similar to common HTML editing properties, and even a new user should be able to master them quickly.
实现的方法是在用户的主目录中创建或编辑一个属性列表文件。
You can do this by creating or editing a property list file within the user's home directory.
如果用户从读模式转换到编辑模式，则此属性可让关键字下拉公式在强制刷新文档时重新计算。
This allows the keyword drop-down formula to recalculate if the user switches from read mode to edit mode as long as the document is forced to refresh.
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