Undo/Redo 復原/重做# remove the # sign and enter foreign help string in this lineUndo 撤消Restore the components to their position before the last movement.把元件恢復至上一次移動的之前的位置Redo 重做Restore the components to their position before the last Undo.把元件恢復至上一次復原操作之前的位置