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#### 31.4.3 Commands For Changing Text

`delete-char (C-d)`
  Delete the character at point. If point is at the beginning of the line, there are no characters in the line, and the last character typed was not bound to `delete-char`, then return eof.
`backward-delete-char (Rubout)`
  Delete the character behind the cursor. A numeric argument means to kill the characters instead of deleting them.
`forward-backward-delete-char ()`
  Delete the character under the cursor, unless the cursor is at the end of the line, in which case the character behind the cursor is deleted. By default, this is not bound to a key.
`quoted-insert (C-q or C-v)`
  Add the next character typed to the line verbatim. This is how to insert key sequences like `C-q`, for example.
`tab-insert (M-<TAB>)`
  Insert a tab character.
`self-insert (a, b, A, 1, !, ...)`
  Insert yourself.
`transpose-chars (C-t)`
  Drag the character before the cursor forward over the character at the cursor, moving the cursor forward as well. If the insertion point is at the end of the line, then this transposes the last two characters of the line. Negative arguments have no effect.
`transpose-words (M-t)`
  Drag the word before point past the word after point, moving point past that word as well. If the insertion point is at the end of the line, this transposes the last two words on the line.
`upcase-word (M-u)`
  Uppercase the current (or following) word. With a negative argument, uppercase the previous word, but do not move the cursor.
`downcase-word (M-l)`
  Lowercase the current (or following) word. With a negative argument, lowercase the previous word, but do not move the cursor.
`capitalize-word (M-c)`
  Capitalize the current (or following) word. With a negative argument, capitalize the previous word, but do not move the cursor.
`overwrite-mode ()`
  Toggle overwrite mode. With an explicit positive numeric argument, switches to overwrite mode. With an explicit non-positive numeric argument, switches to insert mode. This command affects only `emacs` mode; `vi` mode does overwrite differently. Each call to `readline()` starts in insert mode.

  In overwrite mode, characters bound to `self-insert` replace the text at point rather than pushing the text to the right. Characters bound to `backward-delete-char` replace the character before point with a space.

  By default, this command is unbound.