The Selection Settings tab is used to control the way nodes and links are selected within InfoWater Pro.
To change selection settings, go to the
InfoWater Pro tab >
Project group, select on the
Preferences 
button, and then click the
Selection Settings tab in the dialog box.
Selection Shape - This option specifies the default selection type as rectangle or polygon.
Selection Mode - This option specifies the default selection type as a window selection (completely surround the elements) or a crossing (merely touching the desired elements).
Selection Tolerance - This input specifies the size of selection buffer.
OK - Click to save and exit from the Preferences dialog box.
Cancel - Click to exit without saving from the Preferences dialog box.