You have drawn a five-pointed star in a design and want to change the inner radius. How would you achieve this?
An Inner Radius of a Star cannot be modified and would have to be redrawn.
Use the Scale tool while holding down Option+Shift (Mac) or Alt+Shift (Windows).
Select the inner points, then use the Scale tool to uniformly change the radius.
Double-click the Star tool and change the Inner Radius option.