了解如何减小 PowerPoint 演示文稿的大小。

In Display settings, select Brightness , then set the Change brightness based on content drop-down as needed: Off: Adaptive brightness control will be turned off and screen brightness and contrast will not be adjusted. This can result in shorter battery life.

You can use a simple formula to sum numbers in a range (a group of cells), but the SUM function is easier to use when you’re working with more than a few numbers. For example =SUM(A2:A6) is less likely to have typing errors than =A2+A3+A4+A5+A6. Here’s a formula that uses two cell ranges: =SUM(A2:A4,C2:C3) sums the numbers in ranges A2:A4 and C2:C3.

Check your computer's date settings. Excel uses your computer's date system. If a cell's date isn't entered using the same date system, Excel won't recognize it as a true date.

将必应作为默认搜索引擎，将增强在 新版 Microsoft Edge 中的搜索体验，包括直接指向 Windows 应用的链接、来自组织的相关建议（如果使用工作或学校帐户登录），和有关 Windows 的问题的即时解答。 但是，你可以将默认搜索引擎更改为使用 OpenSearch 技术的任何站点。

Improve your meeting organization and effectiveness with meeting notes in Teams. Add agendas, notes, and tasks that can be viewed and edited by participants directly in Teams, with the option to share and edit them in Office.com. Optimize your meeting experience by editing notes before or after the meeting from your Teams Calendar or web browser.

You can use the Advanced Filter dialog box to extract the unique values from a column of data and paste them to a new location. Then you can use the ROWS function to count the number of items in the new range.. Select the range of cells, or make sure the active cell is in a table. Make sure the range of cells has a column heading.

Training: With OneDrive, you can securely store your pictures and files, share and collaborate with others, and get to your files from anywhere - on your computer, laptop, tablet, or phone.

If your cloud storage is full, you'll need to either reduce the amount or size of the files you do have or buy more storage. Learn how to delete files to reduce your storage.

There are several ways to reduce your mailbox size. You can use the Mailbox Cleanup tool to view the size of your mailbox and individual folders. This tool can also help you search for older or very large messages that you might want to delete or move to an Outlook Data File (.pst).