The easiest way to do this is to go to the Views menu and select Viewport Background.
简单的方法是进入视窗菜单,然后选择视窗背景。
Now if we rotate the viewport the background image will remain still.
现在,我们如果旋转视角,背景图像仍会保持静止。
The dimensions of the #header ID class are now in line with the iPhone viewport, and I manually changed the background image to fit in the space.
header ID 类的尺寸现在符合 iPhone 视窗的大小,并且我手动更改了背景图片以适应空间大小。
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