When I want to narrow (only) the width of the vertical navbar, the whole rectangle will get smaller in width + heigt; I only want to change the width, not the height. A smaller font works but I don't want my font to become too small. I've tried to ungroup and all that, but didn't find any solution.

http://www.cirkelvaneenheid.be/Welenhoeck/index.htm

How to control this ?