Create relationships in the Gantt Chart

Move the mouse pointer to the edge of the predecessor activity bar until it turns into a relationship pointer (a vertical single-ended arrow).
Click and hold the mouse button while dragging to the successor activity. Release the mouse button.

If you draw from the right edge of the predecessor to the left edge of the successor, you create a finish to start relationship.

If you draw from the right edge of the predecessor to the right edge of the successor, you create a finish to finish relationship.

If you draw from the left edge of the predecessor to the right edge of the successor, you create a start to finish relationship.

If you draw from the left edge of the predecessor to the left edge of the successor, you create a start to start relationship.

Tips

If no relationship lines are displayed for activity dependencies you have defined, change the Gantt Chart bar options to show relationship lines or click on the Top Layout toolbar.
A hint window is displayed while you are dragging the relationship line between two activities to tell you what kind of relationship will be created when you release the mouse button.
You can add comments about the relationship in the Relationships, Predecessors, or Successors tabs in Activity Details.