What's the difference between Microsoft 365 and Office 2021?
Learn about the differences between a Microsoft 365 subscription, Office 2016, and the free Office Online apps.
适用于:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 家庭版, Office 商业版, Microsoft 365 管理员
SUM function - Microsoft Support
How to use the SUM function in Excel to add individual values, cell references, ranges, or a mix of all three.
适用于:
Microsoft 365 专属 Excel, Microsoft 365 Mac 版专属 Excel, Excel 网页版, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Reset OneDrive - Microsoft Support
Resetting Microsoft OneDrive can sometimes resolve sync issues. Follow the steps to reset your OneDrive.
适用于:
OneDrive for Business, SharePoint Server 订阅版, SharePoint Server 2019, Microsoft 365 中的 SharePoint, OneDrive (工作或学校), OneDrive (家庭或个人), 由世纪互联运营的 OneDrive (工作或学校), OneDrive for Mac, Windows 版 OneDrive
Change the capitalization or case of text - Microsoft Support
Change the capitalization of text to lowercase, UPPERCASE, Capitalize First Word, or Sentence case in your documents.
适用于:
Microsoft 365 专属 Word, Microsoft 365 专属 PowerPoint, Microsoft 365 Mac 版专属 Word, Microsoft 365 Mac 版专属 PowerPoint, Word 网页版, PowerPoint 网页版, Word 2021, PowerPoint 2021, Word 2021 for Mac, PowerPoint 2021 for Mac, Word 2019, PowerPoint 2019, Word 2019 for Mac, PowerPoint 2019 for Mac, Word 2016, PowerPoint 2016
Troubleshoot problems updating Windows - Microsoft Support
Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.
فتح الكاميرا في Windows - دعم Microsoft
كيفية فتح تطبيق الكاميرا في Windows لفتح كاميرا الويب أو الكاميرا، حدد زر البدء، ثم حددجميع التطبيقات ، ثم حدد الكاميرا في قائمة التطبيقات. إذا كان لديك عدة كاميرات، يمكنك التبديل بينها عن طريق تحديد تغيير الكاميرا في ...
激活 Windows - Microsoft 支持
首先需要查看 Windows 11 是否已激活并链接到你的 Microsoft 帐户。 将 Microsoft 帐户链接到设备上的 Windows 11 许可证是至关重要的。 通过将 Microsoft 帐户与数字许可证链接，可以在进行重大硬件更改时使用“激活”疑难解答程序重新激活 Windows。
Video: What is Microsoft Teams? - Microsoft Support
Training: Learn how to get up and productive quickly with this Microsoft Teams Quick Start. Sign in to Teams, select Teams and Channels, reply to conversation threads, @mention someone, use emojis and stickers, and ask T-Bot questions.
适用于:
Microsoft Teams
Change your background in Microsoft Teams meetings
Explore tips to change your Microsoft Teams background. Learn how to replace, blur, or change your Teams background image before or during a meeting.
适用于:
Microsoft Teams
How to find and enable missing Copilot button in Microsoft 365 apps
Copilot is available in the Home tab of Word, Excel (Preview), PowerPoint, and Outlook if you are a Copilot subscriber. If you also have a Microsoft 365 subscription that includes the Microsoft 365 desktop apps then you should find Copilot available in those apps as well.
适用于:
Microsoft 365 专属 Excel, Microsoft 365 专属 Word, Microsoft 365 专属 Outlook, Microsoft 365 专属 PowerPoint, OneNote for Microsoft 365, Microsoft 365 Mac 版专属 Excel, Microsoft 365 Mac 版专属 Word, Microsoft 365 Mac 版专属 Outlook, Microsoft 365 Mac 版专属 PowerPoint, Microsoft 365 Mac 版专属 OneNote