How to track changes in Word using revision marks. Accept, reject, or hide changes made by others working in the file.

You can add columns, rows, or cells to an Excel worksheet or delete them. Columns insert to the left, rows above, and cells above or to the left.

Outlook Data Files contain your email messages, calendar, tasks, and other items on your computer.

Training: Get up to speed in minutes, quickly refer to things you’ve learned, and master keyboard shortcuts with these handy cheat sheets for Microsoft Office.

即使已开启其他防火墙，开启 Microsoft Defender 防火墙也很重要。 它保护你免遭未经授权的访问。 若要打开或关闭 Microsoft Defender 防火墙，请执行以下操作：

This article shows you how to reassign certain keys to make it easier to accomplish your daily tasks.

Microsoft Edge comes with built-in accessibility options such as making text larger, having the web read aloud to you, keyboard shortcuts, and more.

Learn how to use InPrivate browsing in Microsoft Edge if you don't want your browsing data saved on your PC.

Using Authenticator as a way to sign in. If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in:

Learn how to enable Adobe Flash in Microsoft Edge. By pressing submit, your feedback will be used to improve Microsoft products and services.