对 Office 使用产品密钥 - Microsoft 支持
如果通过 Microsoft 工作区折扣计划 购买了 Microsoft 365. 如果通过雇主的 工作区折扣计划(以前称为家用许可计划) 权益安装 Office 专业增强版、Visio Professional 或 Project Professional，请在安装产品后输入产品密钥。
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Visio Plan 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Microsoft 365 for home, InfoPath 2013
Fix common Surface problems using the Surface app and Surface ...
Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.
Track changes in Word - Microsoft Support
How to track changes in Word using revision marks. Accept, reject, or hide changes made by others working in the file.
Applies To:
Word for Microsoft 365, Word for the web, Word 2021, Word 2019, Word 2016, Word for iPad, Word Web App, Word for iPhone
Recover an earlier version of an Office file - Microsoft Support
If the AutoRecover option is turned on, you can automatically save versions of your file while you’re working on it.
Applies To:
Excel for Microsoft 365, PowerPoint for Microsoft 365, Excel 2021, PowerPoint 2021, Excel 2019, PowerPoint 2019, Excel 2016, PowerPoint 2016
Windows Media Player 12 - Microsoft Support
Play music and video in more formats and stream it to more places with Windows Media Player 12.
Outlook で既定のフォントを変更または設定する - Microsoft サポート
新しいメッセージを作成するときに使用する Outlook の既定のフォントを変更または設定します。
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Word help & learning
Get answers to all of your Microsoft Word questions. Find Word help, how-to articles, training videos, tutorials, and more.
Windows の回復オプション - Microsoft サポート
Windows の回復オプションについて説明します。 PC を初期状態に戻す方法、以前のバージョンの Windows に戻す方法、メディアを使って Windows を再インストールする方法を説明します。
更改或删除单个页面上的页眉或页脚 - Microsoft 支持
更改第一页上的页眉或页脚，或者文档中的任何其他页面。
Applies To:
Word for Microsoft 365, Word for Microsoft 365 for Mac, Word for the web, Word 2021, Word 2021 for Mac, Word 2019, Word 2019 for Mac, Word 2016
Edit your existing headers and footers - Microsoft Support
Change your document's header or footer text, remove the first page header or footer, add page numbers, images, or change colors and fonts on headers and footers.
Applies To:
Word for Microsoft 365, Word for Microsoft 365 for Mac, Word 2021, Word 2021 for Mac, Word 2019, Word 2019 for Mac, Word 2016