Change predecessor relationships

1. Choose Project, Activities.
2. Select the activity whose predecessor relationship you want to change.
3. Display Activity Details, then click the Predecessors or Relationships tab. To add a predecessor, click Assign in the Predecessors tab or in the Predecessors area of the Relationships tab. Select the predecessor activity you want to add. To change a relationship type, double-click the appropriate Relationship Type field, then select a new relationship type. To change a lag time value, double-click the appropriate Lag field, then enter a new time value. To remove a predecessor, select the predecessor you want to remove, then click Remove.