Click the points near the bay window
Press down the Alt key while clicking the points.
- Lock the cursor in the x axis direction by pressing the U key, and click the point 7 approximately as shown in the figure.
- Move the cursor in the left-down diagonal direction in
approximately 45 degrees angle until the cursor appears as shown in
the figure below. Click the left mouse button, and the cursor is
locked in the angle of 45 degrees.
- Click the point 8 approximately as shown in the figure below.
