[john.gersh]

The controls you're looking for are in the Properties:Connections and Style:Lines and Shapes Inspectors. In Properties:Connections, select your rectangle and use the pull-down menu to choose the arrangement of the magnets (connection points). The one you describe is 4 Magnets: N,S,E,W. A line will snap to these points as you bring the end of the line near them; an open circle marking the point will turn red. For orthogonal lines, select the line and use the Style: Lines and Shapes Inspector. The control is the center one in the line-style panel (lower part of the inspector). It offers straight, curved, orthogonal, and Bezier line styles.