diff --git a/README.md b/README.md
index 43f3309..aaf74ec 100644
--- a/README.md
+++ b/README.md
@@ -196,6 +196,8 @@ p | toggle perspective warping (quad surfaces only)
 , | select previous surface (projection mapping mode only)
 > | select next vertex
 < | select previous vertex
+0 | Move selected surface one layer up
+9 | Move selected surface one layer down
 f | Toggle fullscreen
 s | Save composition
 z | Undo