Adding monitor rules patch

patches.h

@@ -105,8 +105,16 @@
  */
 #define LOSEFULLSCREEN_PATCH 0
 
-/* The pertag patch adds nmaster, mfacts and layouts per tag rather
- * than per monitor (default).
+/* Adds rules per monitor, e.g. have default layouts per monitor.
+ * The use case for this is if the second monitor is vertical (i.e. rotated) then
+ * you may want to use a different default layout for this monitor than what is
+ * used for the main monitor. E.g. normal vertical split for main monitor and
+ * horizontal split for the second.
+ */
+#define MONITOR_RULES_PATCH 0
+
+/* The pertag patch adds nmaster, mfacts and layouts per tag rather than per
+ * monitor (default).
  * https://dwm.suckless.org/patches/pertag/
  */
 #define PERTAG_PATCH 0