The only way I know is nothing automatic.
This method will, however, center all letters exactly in the middle.
What you do is create a text box and type your letters with a manual line
break after each letter, then highlight all and choose Center Alignment.
All letters will be exactly centered.
Jack
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message I've been known to use tables and/or columns to create the effect of a
vertical font. If you make the column narrow enough and get the margins
right if will move all the text into a vertical line. It is far from
foolproof though, some letters, i.e. l, are narrower than others and so
frustrate this work around.
I am sure someone will be along soon with a much cleverer answer. Good
luck.