Double clicking on the CPACS Writer component during or after workflow execution opens the “CPACS Geometry” view where the current CPACS content is shown. By clicking the button “Show CPACS dataset in TIGL Viewer” the corresponding view “TIGL Viewer” will show the CPACS geometry in the TiGL Viewer, if that viewer is configured. See the help entry for the TiGL Viewer component and the configuration reference for more information on how to configure the TiGL viewer.