-longer key sequence, which may itself be complete or a prefix. For
-example, @kbd{C-x} is a prefix key, so @kbd{C-x} and the next input
-event combine to make a two-event key sequence. This two-event key
-sequence could itself be a prefix key (such as @kbd{C-x 4}), or a
-complete key (such as @kbd{C-x C-f}). There is no limit to the length
-of a key sequence, but in practice people rarely use sequences longer
-than three or four input events.
-
- You can't add input events onto a complete key. For example, the
-two-event sequence @kbd{C-f C-k} is not a key, because the @kbd{C-f}
-is a complete key in itself, so @kbd{C-f C-k} cannot have an
-independent meaning as a command. @kbd{C-f C-k} is two key sequences,
-not one.@refill
+longer key sequence. For example, @kbd{C-x} is a prefix key, so
+typing @kbd{C-x} alone does not invoke a command; instead, Emacs waits
+for further input (if you pause for longer than a second, it echoes
+the @kbd{C-x} key to prompt for that input; @pxref{Echo Area}).
+@kbd{C-x} combines with the next input event to make a two-event key
+sequence, which could itself be a prefix key (such as @kbd{C-x 4}), or
+a complete key (such as @kbd{C-x C-f}). There is no limit to the
+length of key sequences, but in practice they are seldom longer than
+three or four input events.
+
+ You can't add input events onto a complete key. For example,
+because @kbd{C-f} is a complete key, the two-event sequence @kbd{C-f
+C-k} is two key sequences, not one.