When Microsoft Excel detects a corrupted workbook upon opening, it automatically starts File Recovery mode and attempts to repair the workbook.

Learn how to add an app to run automatically at startup. Select the Start button and scroll to find the app you want to run at startup.

There are several ways to calculate the difference between two times.

Add a delivery and return address to a single envelope, set printer options, adjust for envelope size, and save or print.

Use AutoFilter or built-in comparison operators like "greater than" and “top 10” in Excel to show the data you want and hide the rest. Once you filter data in a range of cells or table, you can either reapply a filter to get up-to-date results, or clear a filter to redisplay all of the data.

Learn how to manage the payment information and billing for your Microsoft 365 subscription.

Learn how to AutoSave your files to OneDrive with Excel, PowerPoint or Word.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

Use rules to automatically perform specific actions on email that arrives in your inbox. For example, you can create rules that will change the importance level of messages as they come in, automatically move them to other folders, or delete them based on certain criteria.

What you can customize: You can personalize your ribbon to arrange tabs and commands in the order you want them, hide or unhide your ribbon, and hide those commands you use less often.Also, you can export or import a customized ribbon. What you can't customize: You can't reduce the size of your ribbon, or the size of the text or the icons on the ribbon.