I am new to sketch up and I am designing a garden home. I have created two window openings on different sides but when I come to create a third nothing seems to work. I have tried grouping the wall and exploding it but nothing is working. I have been reading through similar problems on the forum, watching youtube vids and trying to solve the problem over three days now -aaaarrrggghh.
Could someone let me know what I am doing wrong.