Index: trunk/src_plugins/export_bom/bom.c
===================================================================
--- trunk/src_plugins/export_bom/bom.c	(revision 1956)
+++ trunk/src_plugins/export_bom/bom.c	(revision 1957)
@@ -502,6 +502,15 @@
 	PrintBOM();
 }
 
+static int bom_usage(char *topic)
+{
+	fprintf(stderr, "\nbom exporter command line arguments:\n\n");
+	hid_usage(bom_options, sizeof(bom_options) / sizeof(bom_options[0]));
+	fprintf(stderr, "\nUsage: pcb-rnd [generic_options] -x bom foo.pcb [bom_options]\n\n");
+	return 0;
+}
+
+
 static void bom_parse_arguments(int *argc, char ***argv)
 {
 	hid_register_attributes(bom_options, sizeof(bom_options) / sizeof(bom_options[0]), bom_cookie, 0);
@@ -525,6 +534,8 @@
 	bom_hid.do_export = bom_do_export;
 	bom_hid.parse_arguments = bom_parse_arguments;
 
+	bom_hid.usage = bom_usage;
+
 	hid_register_hid(&bom_hid);
 	return NULL;
 }
Index: trunk/src_plugins/export_gcode/gcode.c
===================================================================
--- trunk/src_plugins/export_gcode/gcode.c	(revision 1956)
+++ trunk/src_plugins/export_gcode/gcode.c	(revision 1957)
@@ -860,6 +860,14 @@
 {
 }
 
+static int gcode_usage(char *topic)
+{
+	fprintf(stderr, "\ngcode exporter command line arguments:\n\n");
+	hid_usage(gcode_attribute_list, sizeof(gcode_attribute_list) / sizeof(gcode_attribute_list[0]));
+	fprintf(stderr, "\nUsage: pcb-rnd [generic_options] -x gcode foo.pcb [gcode options]\n\n");
+	return 0;
+}
+
 /* *** Miscellaneous ******************************************************* */
 
 #include "dolists.h"
@@ -900,6 +908,8 @@
 	gcode_hid.calibrate = gcode_calibrate;
 	gcode_hid.set_crosshair = gcode_set_crosshair;
 
+	gcode_hid.usage = gcode_usage;
+
 	hid_register_hid(&gcode_hid);
 
 	return NULL;
Index: trunk/src_plugins/export_gerber/gerber.c
===================================================================
--- trunk/src_plugins/export_gerber/gerber.c	(revision 1956)
+++ trunk/src_plugins/export_gerber/gerber.c	(revision 1957)
@@ -1166,6 +1166,14 @@
 	CRASH;
 }
 
+static int gerber_usage(char *topic)
+{
+	fprintf(stderr, "\ngerber exporter command line arguments:\n\n");
+	hid_usage(gerber_options, sizeof(gerber_options) / sizeof(gerber_options[0]));
+	fprintf(stderr, "\nUsage: pcb-rnd [generic_options] -x gerber foo.pcb [gerber options]\n\n");
+	return 0;
+}
+
 static void gerber_set_crosshair(int x, int y, int action)
 {
 }
@@ -1201,6 +1209,7 @@
 	gerber_hid.fill_rect = gerber_fill_rect;
 	gerber_hid.calibrate = gerber_calibrate;
 	gerber_hid.set_crosshair = gerber_set_crosshair;
+	gerber_hid.usage = gerber_usage;
 
 	hid_register_hid(&gerber_hid);
 	return NULL;
Index: trunk/src_plugins/export_lpr/lpr.c
===================================================================
--- trunk/src_plugins/export_lpr/lpr.c	(revision 1956)
+++ trunk/src_plugins/export_lpr/lpr.c	(revision 1957)
@@ -114,6 +114,14 @@
 
 static HID lpr_hid;
 
+static int lpr_usage(char *topic)
+{
+	fprintf(stderr, "\nlpr exporter command line arguments:\n\n");
+	hid_usage(base_lpr_options, sizeof(base_lpr_options) / sizeof(base_lpr_options[0]));
+	fprintf(stderr, "\nUsage: pcb-rnd [generic_options] -x lpr foo.pcb [lpr options]\n\n");
+	return 0;
+}
+
 static void plugin_lpr_uninit(void)
 {
 	hid_remove_actions_by_cookie(lpr_cookie);
@@ -137,6 +145,8 @@
 	lpr_hid.parse_arguments = lpr_parse_arguments;
 	lpr_hid.calibrate = lpr_calibrate;
 
+	lpr_hid.usage = lpr_usage;
+
 	hid_register_hid(&lpr_hid);
 
 	return plugin_lpr_uninit;