To modify a mating relationship:
To change only the dimension value of a
Distance or
Angle mate, double-click the mate in the FeatureManager design tree, then double-click the dimension to edit. Enter the new value in the
Modify box, then click
Rebuild 
.
You can also control the value of distance and angle mates in a design table. The column header in the design table uses the syntax dimension@mate_name (for example, D1@Distance1.) In the table body cells, type the value for the dimension. See Dimensions in Configurations.