In the Dimension Style Manager, select the style you want to change. Click Options
Modify.
In the Modify Dimension Style dialog box, Fit tab, under Fine Tuning, select Place Text Manually When Dimensioning.
Click OK.
Click Close to exit the Dimension Style Manager.
As you create dimensions, you can move the text along the dimension line. Use the pointing device or enter coordinates to specify the dimension line and text locations.