This illustration shows the Implementation pane for the No sequence flow between the Supervisor Approved? gateway and the Redo Travel Request task. 

In the left navigation pane are the: Documentation, Business Properties, Implementation (selected), and Validation tabs. 

To the right of the left nav is the Implementation pane. 

At the top are the breadcrumbs to the No sequence flow. 

Below that, displayed top to bottom, are the following text fields: Name, Description, Conditional Flow (checkbox), and Condition.  

To the right of the Condition field is an Edit button.

The following item is bordered in red, to call attention to it:
Edit button