Set the map to the position and zoom level you require.
Click the button on the toolbar and then draw a
rectangle on the map where you want to compute the valleys.
Set the valley properties in the Valley Style Settings
pane and click OK.
The following figure shows an example of the Valley Style
Settings pane.
Valley Style Settings pane
The color-coded valley/summit information is displayed
in the rectangle you have drawn and a Valley layer is added to the
Map Layers pane. You can change the colors of the Elevation and Valley
data displayed using the Color Model property.
.
Note
To access the Color Model property,
you must have the Show Advanced Properties option active (Options>Show
Advanced Properties).