In Visio 2007 I created a rounded square and inserted an * into it. How can I
center the * in the current shape of the rounded square?
How accurately do you want the * centered?
Look at the shape format
menu Format -> text
Ensure the margins are equal all round, as well as the indentation,
there are many settings to play around with.
However, the major problem with getting an * exactly centered is more
to do with the particulars of the font you are using and how hight
above the font base the character has been set. It will be different
for different fonts and will also depend upon the font size you have
selected.
If there is a connection point visible in the centre of the shape then
you can align the * to that, otherwise you can create a connection
point in the middle of the shape.
You may need to adjust the shape text margins to get the exact
centering you require.
Or ...
create an image of an * and add that image to the shape, that will
then be centered.