Calibre's edit metadata command makes it easy to display the current metadata associated with a selected document, enabling you to add, edit, or remove document metadata.

利用Calibre的edit metadata命令可方便地显示与所选文档相关的当前元数据，让您可以添加、编辑或删除文档元数据。

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The document gives step-by-step instructions on how to remove the LCD, replace the battery and other tasks.

FORBES: iPad's Screen Cracking Far Less Than iPhone's So Far

"The Remove Hidden Data add-in is a tool that you can use to remove personal or hidden data that might not be immediately apparent when you view the document in your Microsoft Office application, " says the instructions on Microsoft's website.

BBC: NEWS | Technology | Warning over Microsoft Word files