Change your Office product key - Microsoft Support
How to change your product key to fix activation errors that can occur if you own and install multiple one-time purchases of Office..
Applies To:
OneNote for Microsoft 365, Visio Plan 2, OneNote for Microsoft 365 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2021 for Mac, OneNote 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2019 for Mac, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, Office 2016
Help in File Explorer - Microsoft Support
Learn how to open, navigate, and troubleshoot File Explorer in Windows, with answers to common questions and support assistance.
Microsoft Teams help & learning
Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.
Edit a PDF - Microsoft Support
Open and edit PDF content in Word. To edit a PDF, open it in Word. This works best with PDFs that are mostly text.
Applies To:
Word for Microsoft 365, Word 2021, Word 2019, Word 2016
Excel functions (alphabetical) - Microsoft Support
A complete list of all Excel functions in alphabetical order.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel Web App
Set up an Xbox 360 Controller for Windows | Xbox Support
Learn how to set up an Xbox 360 Controller for Windows so you can play PC games with your Xbox controller.
Skype for Business help - Microsoft Support
Skype for Business meeting help. Set up a Skype for Business meeting in Outlook. Join a Skype for Business meeting. Record and playback a Skype for Business meeting
Applies To:
Skype for Business, Skype for Business Basic, Skype for Business for Mac, Skype for Business Online
Configure headers and footers for different sections of a document
Set up headers and footers to provide different content for different sections of a document.
Applies To:
Word for Microsoft 365, Word 2021, Word 2019, Word 2016
Turn on app permissions for your microphone in Windows 10
To use your microphone with apps on Windows 10, you'll need to turn on some permissions in Microphone settings. Then, you'll need to check your app permissions if you want to use your microphone with apps.
如何使用 Windows 11 中的任务栏 - Microsoft 支持
了解如何使用 Windows 11 中的任务栏功能。 使用任务栏设置隐藏任务栏、固定应用、更改位置等。