You can rotate a part during initial placement using Place Part Command or when modifying an existing part. A local coordinate system appears at the origin of the selected port on the part. The active axis of rotation is blue.
Use the arrow keys on your keyboard to rotate the part:
é (up arrow) - Changes the active axis in Z-Y-X order.
shift-é (shift-up arrow) - Changes the active axis in X-Y-Z order.
ê (down arrow) - Changes the active port in ascending order.
shift-ê(shift-down arrow) - Changes the active port in descending order.
ç (left arrow) - Rotates the part 90º counter-clockwise about the active axis.
è (right arrow) - Rotates the part 90º clockwise about the active axis.