Hello, finished skirting line: After clicking on the skirting line with the mouse and it turns red, press the detele key to delete it;

Custom skirting line: Hold down the shift key and at the same time left-click the skirting line area with the mouse, and modify the area type in the attribute of the right area to a single area. (The operation method for deleting the horizontal cutting area/vertical cutting area is the same.)