hdfsee: document --show-rings and --simple-rings options

b2a9f6fb · Richard A. Kirian · Thomas White · 252cca2f · b2a9f6fb
Commit b2a9f6fb authored Jan 27, 2012 by Richard A. Kirian Committed by Thomas White Feb 22, 2012
--- a/src/hdfsee.c
+++ b/src/hdfsee.c
@@ -44,6 +44,9 @@ static void show_help(const char *s)
 "                                    sets all pixels in each 3x3 region to\n"
 "                                    zero if any of them have negative\n"
 "                                    values.\n"
+"      --show-rings                 Overlay rings that indicate resolution.\n"
+"      --simple-rings=XX,YY,...     Overlay rings at specified radii XX, YY, ...\n"
+"                                    in pixel units.\n" 
 "  -c, --colscale=<scale>           Use the given colour scale.  Choose from:\n"
 "                                    mono    : Greyscale, black is zero.\n"
 "                                    invmono : Greyscale, white is zero.\n"