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悬浮窗使用指导 · App Inventor 2 中文网
...里直接设置水平间距和垂直间距，二者独立，默认均为 16；不再提供把 X、Y 一起修改的旧“边距”。例如 Tab 栏高 64，希望空隙 16，就把垂直间距设为 80，水平间距保持 16。
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