Hello,
Inside the cover designer, add a new text box from the left insert menu items. Then Type in the text box your spine text. When the text box is selected there will be a blue circle handle sticking out from the right hand side of the selected box. Use this handle to rotate the text box (HINT:if you hold shift while you rotate the box will snap to 30 degree rotations).
Rotate the box 90 degrees clockwise, to ensure sure spine text is the correct direction.
