diff --git a/man/feh.pre b/man/feh.pre
index b66dc15605b38ae3de1e0b961311ccae2cfacb61..3db4751a48e8185708008cd270970634182229ba 100644
--- a/man/feh.pre
+++ b/man/feh.pre
@@ -1043,7 +1043,9 @@ Scroll up
 .
 .It Ao keypad down Ac , Ao Ctrl+Down Ac Bq scroll_down
 .
-Scroll down
+Scroll down.
+Note that the scroll keys work without anti-aliasing for performance reasons,
+hit the render key after scrolling to antialias the image.
 .
 .It Ao keypad begin Ac Bq render
 .