When you select an object, selection handles display at its extremities. When you click the object again, the handles change to rotation handles.
Select the design or object/s to rotate.
Click the object/s a second time. Rotation handles appear at the corners and an anchor point at the center of the object.
If required, drag the rotation anchor from the center to a new position.
Click a rotation handle, and drag it clockwise or counter-clockwise. An outline and cross-hairs display as you rotate.
Alternatively, click Rotate Right / Left on the toolbar.
Alternatively, use the Rotate By field on the Transform toolbar to enter an exact rotation angle – plus or minus – and press Enter.