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Remove the background of a picture in Office - Microsoft Support
网页The default background area is colored magenta to mark it for removal, while the foreground retains its natural coloring. Learn how to remove the background from a picture in a Microsoft Office file. Use the automatic background removal or draw lines to indicate the areas to keep and remove.
Open files from the File menu - Microsoft Support
网页If you don’t use the list of Recent files, and you’d rather jump straight into browsing folders, use Ctrl+F12 to open the Open dialog box directly. To access files from your Microsoft 365 Groups or SharePoint Online document libraries click the Sites - Your Company link.