indexamajig: Improve --help

src/indexamajig.c

@@ -80,6 +80,7 @@ static void show_help(const char *s)
 "\n"
 "  -i, --input=<filename>  Specify file containing list of images to process.\n"
 "                           '-' means stdin, which is the default.\n"
+"\n"
 "      --indexing=<method> Use 'method' for indexing.  Choose from:\n"
 "                           none     : no indexing\n"
 "                           dirax    : invoke DirAx\n"
@@ -97,7 +98,10 @@ static void show_help(const char *s)
 "                           the \"near Bragg\" location, its coordinates will\n"
 "                           be taken as the centre instead.\n"
 "      --simulate          Simulate the diffraction pattern using the indexed\n"
-"                           unit cell.\n"
+"                           unit cell.  The simulated pattern will be saved\n"
+"                           as \"simulated.h5\".  You can TRY to combine this\n"
+"                           with \"-j <n>\" with n greater than 1, but it's\n"
+"                           not a good idea.\n"
 "      --filter-cm         Perform common-mode noise subtraction on images\n"
 "                           before proceeding.  Intensities will be extracted\n"
 "                           from the image as it is after this processing.\n"