<p>1、选中更换的背景图，单击弹出的工具窗口的（如截图所示）属性<br/></p><p><img src="http://img.imdev.net//ueditor/php/upload/image/20171205/1512455443565535.png" title="1512455443565535.png" alt="image.png"/></p><p>如图操作，点击更改图片，可选择需要的图片做背景</p><p><img src="http://img.imdev.net//ueditor/php/upload/image/20171205/1512455655569664.png" title="1512455655569664.png" alt="image.png"/></p>