Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

In the new Teams, you can switch between apps, respond to chat messages, and join meetings and calls more quickly while using less battery and memory.

Learn how to create installation media for installing or reinstalling Windows 7, Windows 8.1, or Windows 10.

What are the differences between Add shortcut to My files, Sync, and View in File Explorer? Add shortcut to My files, Sync, and View in File Explorer connect a SharePoint library with a folder on your desktop, but there are differences:. Both Add shortcut to My files and Sync use the OneDrive sync app to create a more permanent folder that you can use on a daily basis.

You can undo, redo, or repeat many actions in Microsoft Word, PowerPoint, and Excel. You can undo changes, even after you have saved, and then save again, as long as you are within the undo limits (By default Office saves the last 100 undoable actions).

You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

If the file size of your presentation is too large, try the following tips to make it more manageable.

Office Insiders に参加して、Windows 用の新しい Outlook の使用を開始します。 最新バージョンの Outlook を最初に確認し、改善に役立つフィードバックを送信できます。

注: データが Excel テーブル内にある場合、トランスポーズ機能は使用できません。テーブルを先に範囲に変換するか、TRANSPOSE 関数を使えば行と列の配置を変換できます。