脚本Staircase可以将AE的多个图层快速排列，可设置交错或按照顺序排列，随机排列等
Divide your layers into separate blocks via block size or via label colour. Hovering over the UI will highlight what labels are selected.
Offset layers individually, or control inside and outside the blocks.
Staircase comes with some great additional features like staggering based on position, adding easing to each block and fading between blocks.
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