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).

Get troubleshooting advice and see a list of options available for starting Windows in diagnostic modes such as safe mode.

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

PowerPoint での Copilot を使用して、既存の Word ドキュメントからプレゼンテーションを作成できます。また、Copilot for Microsoft 365 (職場) ライセンスをお持ちの場合は PDF を作成できます。

Learn how to rip (copy) and burn (create) CDs and data DVDs using Windows Media Player.

Learn how to cancel your Microsoft subscriptions such as Microsoft 365, Copilot Pro and Xbox. Troubleshoot issues if you can't cancel your subscription.

Select a location, and then pick an alignment style. Word automatically numbers every page, except designated title pages.

How to use the LOOKUP function in Excel to search in a single row or column and find a value from the same position in a second row or column.

Learn how to format text, add graphics, and more in Word documents. Create professional-looking documents with ease using our step-by-step guide. Try it now!

重要: Microsoft アカウント、Windows オペレーティング システム、およびその他の Microsoft 製品には、お客様の情報をセキュリティで保護するためのパスワードが含まれています。この記事では、パスワードを忘れた場合にリセットまたは回復するために使用できるオプションをいくつか示します。