Combine your background images into a single image and use the CSS background-image and background-position properties to display the desired image segment.
将您的背景图像合并为单个图像并使用CSS背景图像及背景位置要显示所需的图像段的属性。
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In Windows 3.0 you could change the background to display a pattern or bitmap image. The new Windows Paintbrush supported BMP and PCX files.