tools: specify width by height in the edge-detector help

Fixes #13

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/tools/touchpad-edge-detector.c b/tools/touchpad-edge-detector.c
index 5dddc6a67ba250f9347c11bf1149e5d9a919d960..8b16cd76f114afad3094ccfbe21a981b12b559f4 100644 (file)
--- a/tools/touchpad-edge-detector.c
+++ b/tools/touchpad-edge-detector.c
@@ -47,7 +47,7 @@ usage(void) {
        printf("\n");
        printf("This tool reads the touchpad events from the kernel and calculates\n "
               "the minimum and maximum for the x and y coordinates, respectively.\n"
-              "The first argument is the physical size of the touchpad in mm.\n");
+              "The first argument is the physical size of the touchpad in mm (WIDTHxHEIGHT).\n");
        return 1;
 }