From LibreOffice Help
You can only rotate text that is contained in a drawing object.
- Choose View - Toolbars- Drawing to open the Drawing toolbar.
- Select the Text icon
- Drag in your document to draw the text object, and then type your text.
- Click outside of the object, then click the text you entered. Click the Rotate icon
- Drag one of the corner handles of the text object.
|You can also right-click the text object, choose Position and Size, click the Rotation tab, and then enter a rotation angle or a new position for the object.|