When you change the font size, a callout or text box should resize to a logical size.
As an example:
I have the word 'testing' in a text box with 10 point Helvetica font. The fitted size is 0.4369" width x 0.1667" height. When I change it to 30 point Helvetica in properties, it resizes to a box of 0.3753" width and 1.8819" height. This places the letters in this form:
te
st
in
g
This doesn't seem logical. It isn't proportional to the original box size. It is even narrower in absolute dimensions for a larger font. This autosize is automatically unusable. Why can't it be proportional to the original text box size?