要置換的物件必須用筆刷塗上遮罩 (Image of the item you want to swap must be masked with a brush)

要置換的位置必須用筆刷把位置塗上遮罩 (The area to be swapped must be masked with a brush)

如果你的樣本在畫面中比例很大很明顯 背景很單純 建議你用這個工具

https://tensor.art/template/833400891813122431