In 2000, it's dependent on the menu font used (which is set in the Windows
Display dialog) and not actually controlled by Acad with any setting.
Bring up Display Properties while Acad is in the background. Change the
font for the menu, click apply and you can watch the screen menu width
change wildly depending on which font you choose. Some fonts will make the
screen menu cover as much as 1/4 of the screen. Fixed width fonts take up
the least space. I always found MS Sans Serif to be a happy medium for