You can rotate current selected objects by using
Transform>Rotate menu item.
Rotate Option
| Left 45 Degrees | turn current selected objects left 45 degrees |
| Left 90 Degrees | turn current selected objects left 90 degrees |
| 180 Degrees | turn current selected objects 180 degrees |
| Right 45 Degrees | turn current selected objects right 45 degrees |
| Right 90 Degrees | turn current selected objects right 90 degrees |
| Custom Angle | rotate current selected objects by specified angle. |