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Keyboard ALT + g to toggle grid overlay

屋頂掣點編輯

透過使用掣點,在建立和修改屋頂輪廓時取得更多控制。加入頂點時,兩邊的性質與初始邊相同。當您移除頂點時,較低編號的邊緣的性質將用於所產生的邊緣上。