From 3b04123104b51629fe4774bf42c0d6e0ee8fbf0f Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@hey.com>
Date: Mon, 23 Jun 2025 11:27:35 -0400
Subject: [PATCH] Explain use

---
 bin/apple-display-brightness | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/bin/apple-display-brightness b/bin/apple-display-brightness
index b1f6c9e..8d091f8 100755
--- a/bin/apple-display-brightness
+++ b/bin/apple-display-brightness
@@ -1,3 +1,7 @@
 #!/bin/bash
 
-sudo asdcontrol $(sudo asdcontrol --detect /dev/usb/hiddev* | grep ^/dev/usb/hiddev | cut -d: -f1) -- "$1"
+if [[ -z "$1" ]]; then
+  echo "Adjust Apple Display Brightness by passing +5000 or -5000 (or any range from 0-60000)"
+else
+  sudo asdcontrol $(sudo asdcontrol --detect /dev/usb/hiddev* | grep ^/dev/usb/hiddev | cut -d: -f1) -- "$1"
+fi