Click Tools menu Options.At the command prompt,
enter options.
In the Options dialog box, User Preferences
tab, under Associative Dimensioning, select or clear Make New Dimensions
Associative.
Do either or both of the following:
Click Apply to record the current Options
settings in the system registry.
Click OK to record the current Options
settings in the system registry and close the Options dialog box.
All subsequently created dimensions in the drawing
use the new setting. Unlike most other option settings, dimension
associativity is saved in the drawing file rather than in the system
registry.