You can modify dimensions with the AutoCAD LT editing commands and with grip editing. Grip editing is the quickest and easiest way to modify dimensions.
You can also modify selected dimensions by applying a different dimension style or by making changes to the dimension style they are associated with. If you make changes to an existing dimension style, you can choose whether to update the other dimensions associated with that dimension style. You can also change individual dimensioning settings directly for selected dimensions. These are dimension style overrides.
Applying a New Dimension Style to Existing Dimensions
Using Dimension Style Overrides
Stretching Dimensions
Trimming and Extending Dimensions
Modifying Dimension Text
See Also
Using Grips to Edit Objects
Creating Dimensions with Oblique Extension Lines