= Clusters of sensors =
Create two clusters "c1" and "c2" for the Left condition.

 * Display a time series view for the ''Left / ERF'' average:
 * Select a few sensors, and click on the "New sel" button in the "Cluster" tab.
 * Press "Escape" to unselect all the selected sensors.
 * Select another group of sensors, and click on the "New sel" button again.