Custom Backgrounds - Pick a flat, striped or checkered background (or even a custom image) to be drawn beneath the canvas.
自定义背景-选择下方的画布上绘制一个平面，条纹或方格背景(甚至是自定义图像)。
In the case above, every dialog box that wanted controls with custom backgrounds would have to handle the control color notification message.
在上述的情况下，每个需要自定义背景控件的对话框都不得不处理控件颜色通知消息。
Theme developers have new APIs that allow them to easily implement custom backgrounds, headers, shortlinks, menus (no more file editing), post types, and taxonomies.
主题开发者有新的API，这使他们可以很容易的定义背景颜色，顶部，短址，菜单（不再需要编辑文件），文章类型，分类管理。
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