I´m trying to make two new windows in a 3D model recieved from others, but it just doesn´t work. I start drawing a rectangle on face of the wall. Then move it to right position. No problem. Now I choose the push/pull tool and grab the rectangle to move it into the wall. When doing so I can make a box both on the facing side and the other, but I can´t manage to make it a hole. I have tried to click on “the edge” of the existing window besides, but witout luck. When just grabing the rectangle and moving it forth and back edges inside the wall doesn´t show.
What am I doing wrong? I have watch the tutorial video on the subject several times without getting more enlighted (the wall is a parallel structure, so that´s not the problem).
Can anyone get me on the track of cracking the issue??