location == Geometry Control File (.tgc)

command == Read GIS CWF

description == Used to adjust the 2D cell flow widths. The CWF is a factor, for example 0.1 will limit the flow width to 10%. The changed flow width applies to all depths. 

wiki link == https://wiki.tuflow.com/index.php?title=TUFLOW_Empty_Files#TUFLOW_Geometry_Control_file_.28TGC.29

manual link == https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf
manual page == 279