Docs: add missing normal keys <c-[bfud]>

README.asciidoc

@@ -369,8 +369,10 @@ Movement
  * `<a-n>`: select previous match
  * `<a-N>`: add a new selection with previous match
 
- * `pageup`: scroll up
- * `pagedown`: scroll down
+ * `pageup, <c-b>`: scroll one page up
+ * `pagedown, <c-f>`: scroll one page down
+ * `<c-u>`: scroll half a page up
+ * `<c-d>`: scroll half a page down
 
  * `'`: rotate selections (the main selection becomes the next one)
  * `<a-'>`: rotate selections backwards

doc/manpages/keys.asciidoc

@@ -179,11 +179,17 @@ is a sequence of non whitespace characters
 *<a-N>*::
 	add a new selection with previous match
 
-*pageup*::
-	scroll up
+*pageup, <c-b>*::
+	scroll one page up
 
-*pagedown*::
-	scroll down
+*pagedown, <c-f>*::
+	scroll one page down
+
+*<c-u>*::
+	scroll half a page up
+
+*<c-d>*::
+	scroll half a page down
 
 *'*::
 	rotate selections (the main selection becomes the next one)

src/normal.cc

@@ -1989,9 +1989,6 @@ const HashMap<Key, NormalCmd> keymap{
     { {'v'}, {"move view", view_commands<false>} },
     { {'V'}, {"move view (locked)", view_commands<true>} },
 
-    { {Key::PageUp}, {  "scroll one page up", scroll<Backward>} },
-    { {Key::PageDown}, {"scroll one page down", scroll<Forward>} },
-
     { {'y'}, {"yank selected text", yank} },
     { {'p'}, {"paste after selected text", repeated<paste<InsertMode::Append>>} },
     { {'P'}, {"paste before selected text", repeated<paste<InsertMode::Insert>>} },
@@ -2118,6 +2115,9 @@ const HashMap<Key, NormalCmd> keymap{
 
     { {','}, {"user mappings", exec_user_mappings} },
 
+    { {Key::PageUp}, {  "scroll one page up", scroll<Backward>} },
+    { {Key::PageDown}, {"scroll one page down", scroll<Forward>} },
+
     { {ctrl('b')}, {"scroll one page up", scroll<Backward >} },
     { {ctrl('f')}, {"scroll one page down", scroll<Forward>} },
     { {ctrl('u')}, {"scroll half a page up", scroll<Backward, true>} },