Add predecessor relationships

Choose Project, Activities.
Select the activity to which you want to add a predecessor relationship.
Display Activity Details, then click the Predecessors or Relationships tab.
Click Assign in the Predecessors tab or in the Predecessors area of the Relationships tab.
Assign relationships to activities within the same project and/or assign relationships to activities outside of the current project (external relationships):

To assign relationships within the same project, in the Assign Predecessors dialog box select the predecessor activity you want to assign. Click the Assign button, then click the Close button.

To assign a relationship to an activity outside of the current project, in the Assign Predecessors dialog box click the Display Options bar and choose Select Project. Select the external project, then select the predecessor activity you want to assign. Click the Assign button then click the Close button.
To specify a predecessor activity's relationship type, double-click the Relationship Type field, then select a type.
To specify a predecessor activity's lag time, double-click the Lag field, then type the lag time value.
To add comments about a predecessor activity's relationship, double-click the Comments field, then type your comments.

Tip

You can add the Predecessor Details column to the Activity Table to see a list of all predecessors, the relationship type, and the lag applied to the relationship.

To display the Relationships tab in Activity Details, click the Layout Options bar, then choose Bottom Layout Options and add the Relationships tab to the Display Tabs column list.