Index: trunk/Ohana/src/opihi/cmd.data/tvcolors.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/tvcolors.c	(revision 40623)
+++ trunk/Ohana/src/opihi/cmd.data/tvcolors.c	(revision 40626)
@@ -37,4 +37,21 @@
     gprint (GP_ERR, "USAGE: tvcolors (colormap) [-nan red green blue]\n");
     gprint (GP_ERR, " colormap options : greyscale, -greyscale, rainbow, heat, fullcolor, ruffcolor (also grayscale, -grayscale)\n");
+    gprint (GP_ERR, " colormap file name of the for WORD:PATH where WORD = (file,csvf,lgcy,cetf)\n");
+    gprint (GP_ERR, " lgcy:\n");
+    gprint (GP_ERR, "   the colormap file must contain 4 columns: f R B G; each line defines a color transition.\n");
+    gprint (GP_ERR, "   f: 0 - 1 defines the scale value for the transition\n");
+    gprint (GP_ERR, "   R,B,G: 0 - 1 define the value of the color at the transition point\n");
+    gprint (GP_ERR, " file:\n");
+    gprint (GP_ERR, "   the colormap file must contain 4 columns: f R G B; each line defines a color transition.\n");
+    gprint (GP_ERR, "   f: 0 - 1 defines the scale value for the transition\n");
+    gprint (GP_ERR, "   R,G,B: 0 - 1 define the value of the color at the transition point\n");
+    gprint (GP_ERR, " csvf:\n");
+    gprint (GP_ERR, "   the colormap file must contain 4 columns: f,R,G,B separate by commas; each line defines a color transition.\n");
+    gprint (GP_ERR, "   f: 0 - 1 defines the scale value for the transition\n");
+    gprint (GP_ERR, "   R,G,B: 0 - 1 define the value of the color at the transition point\n");
+    gprint (GP_ERR, " cetf:\n");
+    gprint (GP_ERR, "   the colormap file must 256 rows contain 3 columns: R,G,B separate by commas; each line defines a color transition.\n");
+    gprint (GP_ERR, "   R,G,B: 0 - 1 define the value of the color at the transition point\n");
+    gprint (GP_ERR, "   CETF-format files can be found at : https://peterkovesi.com/projects/colourmaps\n");
     return (FALSE);
   }