From the HEC-RTS main window, open a watershed, click the Setup tab, from the Map Window that displays, from the toolbar, click (Time Series Icon Tool) (Figure 1).
Find a location on the Map Window where you want to place a time series icon (Figure 2), hold down the CTRL key, and click the left mouse button. A time series icon with a default name (Location 61) will display on the Map Window (Figure 2).