diff --git a/README.asciidoc b/README.asciidoc
index e04048809..03368df59 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -230,7 +230,10 @@ Changes
  * _|_: pipe each selections through the given external filter program
         and replace the selection with it's output.
  * _alt-|_: pipe each selections through the given external filter program
-        and append the selection with it's output.
+        and ignore its output
+
+ * _!_: insert command output before selection
+ * _a-!_: append command output after selection
 
  * _u_: undo last change
  * _U_: redo last change
diff --git a/doc/keymap b/doc/keymap
index 1d1b51638..265636128 100644
--- a/doc/keymap
+++ b/doc/keymap
@@ -1,5 +1,5 @@
 ┌───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┬───────┲━━━━━━━━━━━━━━┓
-│  upper│       │convtab│       │selpipe│sel all│       │  align│pattern│       │       │       │       ┃ ⇤            ┃
+│  upper│ cmdout│convtab│       │selpipe│sel all│       │  align│pattern│       │       │       │       ┃ ⇤            ┃
 ├┄┄CASE┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┼┄┄┄┄┄┄┄┨              ┃
 │  lower│ 1     │ 2     │ 3     │ 4     │ 5     │ 6     │ 7     │ 8     │ 9     │ 0     │       │       ┃              ┃
 ┢━━━━━━━┷━━━┱───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┴───┬───┺━━━┳━━━━━━━━━━┫