that is part of the environment settings. it can be changed in the "standards" menu under tools. you will need to be cat admin to prform this change. also, these settings are stored in the drawing so may need to redo the print after you have the standards changed. if you would like to not do this. you may be able to select the dimentions and in the properties menu hit "more" this "may" allow you to change the standards for the existing dimentions. but, this option has been hit or miss as to wether it will work.