Hi Camille--
To achieve this, you can set the rotate attribute on the table cell to 1:
- Place the caret in the cell you want to rotate
- Right-click, and select Modify Attribute->Cell...
- Find the rotate attribute and enter a 1
You will not see the rotated text in the editor view, but you will see it in PDF output.
Note that this is a fairly recently added feature, you would need version 6.0 or later to use this, and you either need to be using a standard Styler stylesheet, or you need to make sure your FOSI or XSL-FO stylesheet has appropriate templates to handle the rotate attribute.
--Clay