How do you create a horizontal line in Pages '08? In Word, I usually just type 3 dashes and after pressing the "Enter" key, it creates a horizontal line that fits the margin.
Click Insert on the Menu Bar. Insert > Shape > Line To format the line, go to Inspector. To adjust the angle, go to "Metric" in Inspector. To format the line (color, stroke, endpoints, shadow, etc,), go to "Graphic" in Inspector. This is the only way I know so far. Maybe the others have a quicker way, hehehe... Hope this helps!