updated help message concerning window/level cmd line option

diff --git a/vv/vv.cxx b/vv/vv.cxx
index f83dd3d88600fa03aaeacf4dcf38e42bd752a406..47057e4a0ed335cc3720cec279c5ffcfab6f9c29 100644 (file)
--- a/vv/vv.cxx
+++ b/vv/vv.cxx
@@ -169,8 +169,8 @@ int main( int argc, char** argv )
                     << "Open file(s) for visualization." << std::endl << std::endl
                     << "OPTIONS may be:" << std::endl
                     << "--help         \t Print command line help and exit." << std::endl
-                    << "--window number\t Gray scale window width for all images." << std::endl
-                    << "--level number \t Gray scale window level for all images." << std::endl
+                    << "--window number\t Gray scale window width for set of images appearing before in the cmd line (may appear more than once)." << std::endl
+                    << "--level number \t Gray scale window level for set of images appearing before in the cmd line (may appear more than once)." << std::endl
                     << "--linkall      \t Link pan, zoom and spatial position of crosshair in images." << std::endl
                     << "--log          \t Log output messages in vv-log directory." << std::endl
                     << "--state file   \t Read display parameters from file." << std::endl