You can change the background colour or the background fill of the current slide or all of the slides in your document. For a background fill, you can use hatching, a gradient, or a bitmap image.
您可以修改当前幻灯片或文档中所有幻灯片的背景颜色或背景填充。对于背景填充，您可以使用阴影线、渐变或位图图像。