After you assemble all the workflow steps on the Layout tab, you can adjust their sequence.
To adjust the sequence of steps in an open workflow:
In the Workflow window, click the Step Sequence tab.
The Step Sequence tab lists all of the workflow steps.
Select a workflow step, and then click the arrows at the bottom of the tab to move the selected workflow step up or down in the display sequence.
On the Workflow tab, the First Step field displays the first workflow step.