1 files changed, 5 insertions, 1 deletions
diff --git a/uxd.rst b/uxd.rst
index 170c46f..c4e06be 100644
--- a/uxd.rst
+++ b/uxd.rst
@@ -87,7 +87,11 @@ over the environment.
   characters. Positive *pos* means seek from the start of the
   input. Negative *pos* only works on files (not standard input); it
   means seek backward from EOF.
-  NOT IMPLEMENTED YET.
+
+-S pos
+  Same as **-s**, but file offsets start at 0 rather than the
+  position after seeking. **-S 100** is the same as **-s 100 -o -100**.
+  Works with negative *pos*, too.
 
 -u
   Use uppercase hex digits A-F. Default is lowercase.