To change the direction of text in a text box:
1. Left-click the text box you wish to rotate and choose the fourth icon from the left (it looks like a ruler)from the toolbar on the top right of the editor.
2. Next to the word 'Angle', drag the point on the circle either clockwise or counter clockwise.
3. As you drag the mouse cursor around, you will see the text being rotated and there will also be a numeric value displayed to show you the rotate angle.
4. Release the mouse button to apply the rotation.

You may then need to re-shape the text box to create a better fit.

Please note, text boxes cannot be 'freely' rotated in the same way a photo can.