diff -Naur MPlayer-cvs.orig/DOCS/tech/slave.txt MPlayer-cvs/DOCS/tech/slave.txt
--- MPlayer-cvs.orig/DOCS/tech/slave.txt	2004-09-16 00:00:52.813177992 +0200
+++ MPlayer-cvs/DOCS/tech/slave.txt	2004-09-16 00:05:31.295842192 +0200
@@ -94,6 +94,10 @@
     Toggle vsync (1 == on, 0 == off). If no value is provided,
     vsync status is inverted.
 
+switch_ratio [<value>]
+    Change aspect ratio at runtime. Value is the new aspect ratio expressed
+    as a float (eg. 1.77778 for 16/9).
+
 panscan <value> [value2]
     ???