Recover lost or deleted files - Microsoft Support
If you can't find a file on your computer or you accidently modified or deleted a file, you can restore it from a backup (if you're using Windows backup) or you can try to restore it from a previous version.Previous versions are copies of files and folders that Windows automatically saves as part of a restore point.
Restore deleted email messages in Outlook.com or Outlook on the web
When you accidentally delete an email message from your mail, you can recover those items if they're still in your Deleted Items or Junk Email folder, and in some cases you can even recover items after the Deleted Items folder is emptied.
适用于:
Outlook 网页版, Outlook.com
Customize the Quick Access Toolbar - Microsoft Support
Notes: To find an item in the Choose commands from list, it may be helpful to first confirm its location and name within the app. Commands that are no longer visible in the app could still be listed here under All commands.To help identify this type of command, a more descriptive tooltip name may appear in parentheses next to the legacy command name in this form:
适用于:
Microsoft 365 专属 Excel, Microsoft 365 专属 Word, Microsoft 365 专属 Outlook, Microsoft 365 专属 PowerPoint, Microsoft 365 专属 Access, OneNote for Microsoft 365, Project Online 桌面客户端, Microsoft 365 专属 Publisher, Visio 计划 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project 专业版 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project 专业版 2016, Project Standard 2016, Publisher 2016, Visio 专业版 2016, Visio 标准版 2016, InfoPath 2013, SharePoint Workspace 2010
使用 IF 检查单元格是否为空白 - Microsoft 支持
有些时候，你需要检查单元格是否为空白，通常是因为你可能不希望公式没有输入值就显示结果。 此情况下，将 IF 与 ISBLANK 函数搭配使用： =IF(ISBLANK(D2),"Blank","Not Blank")
适用于:
Microsoft 365 专属 Excel, Microsoft 365 Mac 版专属 Excel, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Upgrade to Windows 10 Pro - Microsoft Support
Windows 10 Pro offers more advanced security and business networking features, including: BitLocker Drive Encryption
Windows 中的用户帐户访问 - Microsoft 支持
登录到 Windows 是指验证身份以访问 Windows 设备的过程。 此过程有助于保护你的个人信息和设置免受未经授权的访问。 登录时，如果你设置了 Windows Hello，则可以使用密码、PIN 或生物识别数据（如指纹或面部识别）。
COUNTIFS Function - support.office.com
由于此网站的设置，我们无法提供该页面的具体描述。
IFS function - Microsoft Support
The IFS function checks whether one or more conditions are met and returns a value that corresponds to the first TRUE condition. IFS will allow you to include up to 127 pairs of conditions (the test if something is True and the result if something is true). IFS can take the place of multiple nested IF statements.
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
Anzeigen und Löschen des Browserverlaufs in Microsoft Edge
Löschen von Browserdaten, die in der Cloud gespeichert sind (bei aktivierter Synchronisierung oder Personalisierung) Weitere Informationen zum Verwalten und Löschen von Daten, die in der Microsoft-Cloud gespeichert sind, finden Sie unter Datenschutzdashboard.Im Datenschutzdashboard können Sie Ihre Daten anzeigen oder löschen.
Open Snipping Tool and take a screenshot - Microsoft Support
Take a screenshot with the Snipping Tool. Rectangular mode is selected by default. You can change the shape of your snip by choosing one of the following options in the toolbar: Rectangular mode, Window mode, Full-screen mode, and Free-form mode.