In dialogs that provide a list of selection sets to select from, click the […] to open the “Select Selection Set” dialog.

The dialog displays the hierarchical representation of the selection sets in the current hydraulic model. You can select any selection set and click the OK button, double-click a selection set or right-click a selection set and click “Select” in the context menu that appears. When the dialog closes, the selected selection set will be shown in the drop-down list.

Clicking cancel will not change the selected selection set in the drop-down list.