To rotate active items, do one of the following:

• Select the Item tool and move the mouse over a corner handle. When the Rotation pointer displays, click to establish a rotation point; then drag in a circular motion to rotate the item. The Arrowhead pointer and the item’s position will display as you drag. If you press the Shift key when rotating, movements are constrained to 45-degree angles.
• Choose Item > Modify (Command+M/Ctrl+M), enter a value in the Angle field, and click OK.
• Enter a value in the field on the Measurements palette (Classic and Space/Align tabs) and press Return/Enter.

To rotate a straight line, choose either Left Point, Midpoint, or Right Point from the Mode drop-down menu (Modify dialog box or Measurements palette) to display the Angle field. To rotate a Bézier line, display its bounding box by unchecking Shape (Item > Edit).