Tip: If you don't remember the exact file or folder name or its location, you can search for it by typing part of the name in the search box in the Documents library. To restore a file or folder to a previous state. Right-click the file or folder, and then select Restore previous versions.

In the search box on the taskbar, type device manager, then select Device Manager from the menu.

After you create your drop-down list, make sure it works the way you want. For example, you might want to check to see if Change the column width and row height to show all your entries.. If the list of entries for your drop-down list is on another worksheet and you want to prevent users from seeing it or making changes, consider hiding and protecting that worksheet.

如果在设置中打开用与首选语言不同的语言编写的页面，Microsoft Edge会自动提示你翻译它。 转到用外语编写的网页时，“翻译”图标 显示在地址栏中。 如果语言未包含在设置中的首选语言列表中，则该语言被视为外在语言。

To add a person to the Safe Senders List, click a message from the sender. On the Home tab, in the Delete group, click Junk, and then click Never Block Sender.. To add a specific address or domain to the Safe Recipients List, click a message from the sender.

Notes: The formatting options that appear in the Formatting tab depend on the data you have selected. If your selection contains only text, then the available options are Text, Duplicate, Unique, Equal To, and Clear.When the selection contains only numbers, or both text and numbers, then the options are Data Bars, Colors, Icon Sets, Greater, Top 10%, and Clear.

To delete a page that contains text, graphics, or empty paragraphs, select the content to delete, and press Delete.You can also do this:

The troubleshooter provides steps for you to follow. If a program isn't listed in the uninstall options, you'll be asked for that program's product code. To access the code, you'll need a tool for reading MSI files—which is typically available to IT professionals. You'll find the product code in the property table of the MSI file. What it fixes

If you don't see your printer, try to fix the problem by using the steps in Fix printer connection and printing problems in Windows. Related topics. Find out how to install a printer in Windows. Find out how to download printer drivers in Windows.

Learn common SharePoint Online tasks with these videos and tutorials, and get links to more training for SharePoint and Office 365.