Learn how to use OneDrive Files On-Demand to sync your OneDrive files and save disk space in Windows 10.

Lists all Excel functions by their category, such as Logical functions or Text functions.

Change two-step verification settings; Common problems with two-step verification for work or school accounts; Manage app passwords for two-step verification

Learn how you can use the free Microsoft Authenticator app to sign in to all your accounts without using a password.

The Feedback Hub app lets you tell Microsoft about any problems you run into while using Windows 11 or Windows 10. You can also send suggestions to help us improve your Windows experience.

Learn how to manage and set device screen time limits on Windows, Xbox, and mobile devices connected through the Microsoft Family Safety app.

可以使用 简单的公式对) 一组单元格 (区域中的数字求和，但在处理多个数字时 ，sum 函数 更易于使用。 例如，=sum (a2：a6) 出现键入错误的可能性小于 =a2+a3+a4+a5+a6。 下面是使用两个单元格区域的公式： =sum (a2：a4，c2：c3) 对区域 a2：a4 和 c2：c3 中的数字求和。 可按 enter 获取总计 39787。

Learn how to identify a phishing scam, designed to steal money via fake emails.

Know which environment you're in Power Query is well-integrated into the Excel user interface, especially when you import data, work with connections, and edit Pivot Tables, Excel tables, and named ranges. To avoid confusion, it’s important to know which environment you are currently in, Excel or Power Query, at any point in time.

The TEXT function lets you change the way a number appears by applying formatting to it with format codes.It's useful in situations where you want to display numbers in a more readable format, or you want to combine numbers with text or symbols.