Edit the Dimension Precision
Select a dimension, and then the precision from the list on the mini toolbar.

Edit the precision of several dimensions at a time as follows:
- Select the dimensions in the drawing (Ctrl+left mouse button).
 - Select the context-sensitive function 
 Properties. - Edit the properties on the Text tab of the Properties dialog box. 
- Select Precision. Defines the dimensioning precision, the decimal precision of the dimension.
 - Select Inch conv.. Defines the precision of the inch conversion.
 
 - Select OK.
 
