Part Modeling > Edit Features > Pattern > Dimension Patterns > Using Negative Increment in a Dimension Pattern
  
Using Negative Increment in a Dimension Pattern
A positive or negative value for the increment determines the direction in which pattern instances are added:
A positive increment causes the system to place instances in the same direction as the initial feature was placed.
A negative increment reverses this direction.
You can reverse the direction in which instances are added to the pattern leader by specifying a negative increment.