1 files changed, 3 insertions, 0 deletions

diff --git a/pfc.1 b/pfc.1
index 348cec2..2ee7c37 100644
--- a/pfc.1
+++ b/pfc.1
@@ -40,6 +40,9 @@ Delete the contents of the input buffer and the stack.
 .TP
 .B Shift-a
 Toggle between degree and radian mode.
+.TP
+.B Shift-n
+Negation. If there is a number in the buffer, negate it. Otherwise, negate the bottom number in the stack.
 .SS Operators
 .TP
 .B +