To set the direction of a directed node feature (e.g. Gas Pressure Reducing Valve):

1. Click on the Set Directed Node tool.
2. Right-Click on a directed node feature (e.g. Gas Pressure Reducing Valve) to select it. The directed node feature highlights.
3. Right-Click on a connected linear feature. The linear feature briefly highlights and the directed node feature aligns itself in the direction of the linear feature.