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Loading Curvature Files
Use the File->Curvature->Load Curvature... item to load a curvature file. You can also control-right click the curvature button in the toolbar.
Curvature Display Options
The curvature is displayed as either a green/red color scale or a binary gray background. When no overlay is displayed, the green/red color scale is used. When an overlay is active, the simpler gray is used. You can turn the curvature display on and off with the View->Curvature menu option or by clicking the curvature button on the toolbar.
The View->Configure->Configure Curvature Display dialog box (also available by control-clicking the curvature button on the toolbar) allows you to set the midpoint and slope of the curvature color scale. This affects both the green/red and the gray display.
Saving Curvature Files
Use the File->Curvature->Save Curvature to save the curvature values and overwrite the original file, or File->Curvature->Save Curvature As... to save a new curvature file in a new location.