This illustration shows the Implementation pane for the Yes sequence flow between the Amount > 5000 gateway and the Review by Supervisor 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 Yes 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