To trace upstream:

1. Click on the Trace mode control and select Trace Upstream.
2. Click on the Select "From" Feature button. The command prompt reads: From: > Identify element.
3. Click on a water feature in the graphical view to specify the start feature for the Trace. The feature label appears in the "From" Feature display.
4. Click on the Trace button. Features connected upstream from the start feature are highlighted.