diff --git a/keyboard.zsh b/keyboard.zsh
index 36dc845..dbcb650 100644
--- a/keyboard.zsh
+++ b/keyboard.zsh
@@ -124,199 +124,202 @@ function prepend-sudo() {
 }
 zle -N prepend-sudo
 
-zstyle -s ':omz:editor' keymap 'keymap'
-if [[ "$keymap" == (emacs|) ]]; then
-  # Use Emacs key bindings.
-  bindkey -e
-
-  [[ -n "$keyinfo[Escape]" ]] && \
-    for key in "$keyinfo[Escape]"{B,b}; \
-      bindkey -M emacs "$key" emacs-backward-word
-  [[ -n "$keyinfo[Escape]" ]] && \
-    for key in "$keyinfo[Escape]"{F,f}; \
-      bindkey -M emacs "$key" emacs-forward-word
-  [[ -n "$keyinfo[Escape]" && -n "$keyinfo[Left]" ]] && \
-    bindkey -M emacs "$keyinfo[Escape]$keyinfo[Left]" emacs-backward-word
-  [[ -n "$keyinfo[Escape]" && -n "$keyinfo[Right]" ]] && \
-    bindkey -M emacs "$keyinfo[Escape]$keyinfo[Right]" emacs-forward-word
-
-  # Kill to the beginning of the line.
-  [[ -n "$keyinfo[Escape]" ]] && \
-    for key in "$keyinfo[Escape]"{K,k}; \
-      bindkey -M emacs "$key" backward-kill-line
+# Emacs key bindings.
+[[ -n "$keyinfo[Escape]" ]] && \
+  for key in "$keyinfo[Escape]"{B,b}; \
+    bindkey -M emacs "$key" emacs-backward-word
+[[ -n "$keyinfo[Escape]" ]] && \
+  for key in "$keyinfo[Escape]"{F,f}; \
+    bindkey -M emacs "$key" emacs-forward-word
+[[ -n "$keyinfo[Escape]" && -n "$keyinfo[Left]" ]] && \
+  bindkey -M emacs "$keyinfo[Escape]$keyinfo[Left]" emacs-backward-word
+[[ -n "$keyinfo[Escape]" && -n "$keyinfo[Right]" ]] && \
+  bindkey -M emacs "$keyinfo[Escape]$keyinfo[Right]" emacs-forward-word
+
+# Kill to the beginning of the line.
+[[ -n "$keyinfo[Escape]" ]] && \
+  for key in "$keyinfo[Escape]"{K,k}; \
+    bindkey -M emacs "$key" backward-kill-line
 
-  # Redo.
-  [[ -n "$keyinfo[Escape]" ]] && \
-    bindkey -M emacs "$keyinfo[Escape]_" redo
+# Redo.
+[[ -n "$keyinfo[Escape]" ]] && \
+  bindkey -M emacs "$keyinfo[Escape]_" redo
 
-  # Search previous character.
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]B" vi-find-prev-char
+# Search previous character.
+[[ -n "$keyinfo[Control]" ]] && \
+  bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]B" vi-find-prev-char
 
-  # Match bracket.
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]]" vi-match-bracket
+# Match bracket.
+[[ -n "$keyinfo[Control]" ]] && \
+  bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]]" vi-match-bracket
 
-  # Edit command in an external editor.
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]E" edit-command-line
+# Edit command in an external editor.
+[[ -n "$keyinfo[Control]" ]] && \
+  bindkey -M emacs "$keyinfo[Control]X$keyinfo[Control]E" edit-command-line
 
-  # Expand .... to ../..
-  if zstyle -t ':omz:editor' dot-expansion; then
-    bindkey -M emacs "." expand-dot-to-parent-directory-path
-  fi
+# Expand .... to ../..
+if zstyle -t ':omz:editor' dot-expansion; then
+  bindkey -M emacs "." expand-dot-to-parent-directory-path
+fi
 
-  # Bind to history substring search plugin if enabled;
-  # otherwise, bind to built-in Zsh history search.
-  if (( $+widgets[history-incremental-pattern-search-backward] )); then
-    [[ -n "$keyinfo[Control]" ]] && \
-      bindkey -M emacs "$keyinfo[Control]R" \
-        history-incremental-pattern-search-backward
-    [[ -n "$keyinfo[Control]" ]] && \
-      bindkey -M emacs "$keyinfo[Control]S" \
-        history-incremental-pattern-search-forward
-  else
-    [[ -n "$keyinfo[Control]" ]] && \
-      bindkey -M emacs "$keyinfo[Control]R" \
-        history-incremental-search-backward
-    [[ -n "$keyinfo[Control]" ]] && \
-      bindkey -M emacs "$keyinfo[Control]S" \
-        history-incremental-search-forward
-  fi
-elif [[ "$keymap" == vi ]]; then
-  # Use vi key bindings.
-  bindkey -v
+# Bind to history substring search plugin if enabled;
+# otherwise, bind to built-in Zsh history search.
+if (( $+widgets[history-incremental-pattern-search-backward] )); then
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M emacs "$keyinfo[Control]R" \
+      history-incremental-pattern-search-backward
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M emacs "$keyinfo[Control]S" \
+      history-incremental-pattern-search-forward
+else
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M emacs "$keyinfo[Control]R" \
+      history-incremental-search-backward
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M emacs "$keyinfo[Control]S" \
+      history-incremental-search-forward
+fi
 
-  # Edit command in an external editor.
-  bindkey -M vicmd "v" edit-command-line
+# Vi key bindings.
 
-  # Show cursor position.
-  bindkey -M vicmd "ga" what-cursor-position
+# Edit command in an external editor.
+bindkey -M vicmd "v" edit-command-line
 
-  # Undo/Redo
-  bindkey -M vicmd "u" undo
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey -M vicmd "$keyinfo[Control]R" redo
+# Show cursor position.
+bindkey -M vicmd "ga" what-cursor-position
 
-  # Expand .... to ../..
-  if zstyle -t ':omz:editor' dot-expansion; then
-    bindkey -M viins "." expand-dot-to-parent-directory-path
-  fi
+# Undo/Redo
+bindkey -M vicmd "u" undo
+[[ -n "$keyinfo[Control]" ]] && \
+  bindkey -M vicmd "$keyinfo[Control]R" redo
 
-  # Switch to command mode.
-  bindkey -M viins "jk" vi-cmd-mode
-  bindkey -M viins "kj" vi-cmd-mode
+# Expand .... to ../..
+if zstyle -t ':omz:editor' dot-expansion; then
+  bindkey -M viins "." expand-dot-to-parent-directory-path
+fi
 
-  # History
-  bindkey -M vicmd "gg" beginning-of-history
-  bindkey -M vicmd "G" end-of-history
+# Switch to command mode.
+bindkey -M viins "jk" vi-cmd-mode
+bindkey -M viins "kj" vi-cmd-mode
 
-  # Bind to history substring search plugin if enabled;
-  # otherwise, bind to built-in Zsh history search.
-  if (( $+plugins[(er)history-substring-search] )); then
-    bindkey -M vicmd "k" history-substring-search-up
-    bindkey -M vicmd "j" history-substring-search-down
-  else
-    bindkey -M vicmd "k" up-line-or-history
-    bindkey -M vicmd "j" down-line-or-history
-  fi
+# History
+bindkey -M vicmd "gg" beginning-of-history
+bindkey -M vicmd "G" end-of-history
 
-  if (( $+widgets[history-incremental-pattern-search-backward] )); then
-    bindkey -M vicmd "?" history-incremental-pattern-search-backward
-    bindkey -M vicmd "/" history-incremental-pattern-search-forward
-  else
-    bindkey -M vicmd "?" history-incremental-search-backward
-    bindkey -M vicmd "/" history-incremental-search-forward
-  fi
+# Bind to history substring search plugin if enabled;
+# otherwise, bind to built-in Zsh history search.
+if (( $+plugins[(er)history-substring-search] )); then
+  bindkey -M vicmd "k" history-substring-search-up
+  bindkey -M vicmd "j" history-substring-search-down
 else
-  print "omz: invalid keymap: $keymap" >&2
-  unset keymap
-  return 1
+  bindkey -M vicmd "k" up-line-or-history
+  bindkey -M vicmd "j" down-line-or-history
 fi
-unset keymap
-
-# The next key bindings are for both Emacs and Vi.
-[[ -n "$keyinfo[Home]" ]] && \
-  bindkey "$keyinfo[Home]" beginning-of-line
-[[ -n "$keyinfo[End]" ]] && \
-  bindkey "$keyinfo[End]" end-of-line
 
-[[ -n "$keyinfo[Insert]" ]] && \
-  bindkey "$keyinfo[Insert]" overwrite-mode
-[[ -n "$keyinfo[Delete]" ]] && \
-  bindkey "$keyinfo[Delete]" delete-char
-[[ -n "$keyinfo[Backspace]" ]] && \
-  bindkey "$keyinfo[Backspace]" backward-delete-char && \
-  stty erase "$keyinfo[Backspace]"
+if (( $+widgets[history-incremental-pattern-search-backward] )); then
+  bindkey -M vicmd "?" history-incremental-pattern-search-backward
+  bindkey -M vicmd "/" history-incremental-pattern-search-forward
+else
+  bindkey -M vicmd "?" history-incremental-search-backward
+  bindkey -M vicmd "/" history-incremental-search-forward
+fi
 
-[[ -n "$keyinfo[Left]" ]] && \
-  bindkey "$keyinfo[Left]" backward-char
-[[ -n "$keyinfo[Right]" ]] && \
-  bindkey "$keyinfo[Right]" forward-char
+# Emacs and Vi key bindings.
+for keymap in 'emacs' 'viins'; do
+  [[ -n "$keyinfo[Home]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Home]" beginning-of-line
+  [[ -n "$keyinfo[End]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[End]" end-of-line
+
+  [[ -n "$keyinfo[Insert]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Insert]" overwrite-mode
+  [[ -n "$keyinfo[Delete]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Delete]" delete-char
+  [[ -n "$keyinfo[Backspace]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Backspace]" backward-delete-char && \
+    stty erase "$keyinfo[Backspace]"
+
+  [[ -n "$keyinfo[Left]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Left]" backward-char
+  [[ -n "$keyinfo[Right]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Right]" forward-char
+
+  # Expand history on space.
+  bindkey -M "$keymap" ' ' magic-space
 
-# Expand history on space.
-bindkey ' ' magic-space
+  if (( $+plugins[(er)history-substring-search] )); then
+    [[ -n "$keyinfo[Up]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Up]" history-substring-search-up
+    [[ -n "$keyinfo[Down]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Down]" history-substring-search-down
+    [[ -n "$keyinfo[Control]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Control]P" history-substring-search-up
+    [[ -n "$keyinfo[Control]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Control]N" history-substring-search-down
+  else
+    [[ -n "$keyinfo[Up]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Up]" up-line-or-history
+    [[ -n "$keyinfo[Down]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Down]" down-line-or-history
+    [[ -n "$keyinfo[Control]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Control]P" up-line-or-history
+    [[ -n "$keyinfo[Control]" ]] && \
+      bindkey -M "$keymap" "$keyinfo[Control]N" down-line-or-history
+  fi
 
-if (( $+plugins[(er)history-substring-search] )); then
-  [[ -n "$keyinfo[Up]" ]] && \
-    bindkey "$keyinfo[Up]" history-substring-search-up
-  [[ -n "$keyinfo[Down]" ]] && \
-    bindkey "$keyinfo[Down]" history-substring-search-down
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey "$keyinfo[Control]P" history-substring-search-up
+  # Clear screen.
   [[ -n "$keyinfo[Control]" ]] && \
-    bindkey "$keyinfo[Control]N" history-substring-search-down
-else
-  [[ -n "$keyinfo[Up]" ]] && \
-    bindkey "$keyinfo[Up]" up-line-or-history
-  [[ -n "$keyinfo[Down]" ]] && \
-    bindkey "$keyinfo[Down]" down-line-or-history
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey "$keyinfo[Control]P" up-line-or-history
-  [[ -n "$keyinfo[Control]" ]] && \
-    bindkey "$keyinfo[Control]N" down-line-or-history
-fi
+    bindkey -M "$keymap" "$keyinfo[Control]L" clear-screen
 
-# Clear screen.
-[[ -n "$keyinfo[Control]" ]] && \
-  bindkey "$keyinfo[Control]L" clear-screen
+  # Expand command name to full path.
+  [[ -n "$keyinfo[Escape]" ]] && \
+    for key in "$keyinfo[Escape]"{E,e}; \
+      bindkey -M "$keymap" "$key" expand-cmd-path
 
-# Expand command name to full path.
-[[ -n "$keyinfo[Escape]" ]] && \
-  for key in "$keyinfo[Escape]"{E,e}; \
-    bindkey "$key" expand-cmd-path
+  # Duplicate the previous word.
+  [[ -n "$keyinfo[Escape]" ]] && \
+    for key in "$keyinfo[Escape]"{M,m}; \
+      bindkey -M "$keymap" "$key" copy-prev-shell-word
 
-# Duplicate the previous word.
-[[ -n "$keyinfo[Escape]" ]] && \
-  for key in "$keyinfo[Escape]"{M,m}; \
-    bindkey "$key" copy-prev-shell-word
+  # Use a more flexible push-line.
+  [[ -n "$keyinfo[Control]" && -n "$keyinfo[Escape]" ]] && \
+    for key in "$keyinfo[Control]Q" "$keyinfo[Escape]"{q,Q}; \
+      bindkey -M "$keymap" "$key" push-line-or-edit
 
-# Bind Shift + Tab to go to the previous menu item.
-[[ -n "$keyinfo[BackTab]" ]] && \
-  bindkey "$keyinfo[BackTab]" reverse-menu-complete
+  # Bind Shift + Tab to go to the previous menu item.
+  [[ -n "$keyinfo[BackTab]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[BackTab]" reverse-menu-complete
 
-# Complete in the middle of word.
-[[ -n "$keyinfo[Control]" ]] && \
-  bindkey "$keyinfo[Control]I" expand-or-complete-prefix
+  # Complete in the middle of word.
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Control]I" expand-or-complete-prefix
 
-# Convert .... to ../.. automatically.
-if zstyle -t ':omz:editor' dot-expansion; then
-  # Do not expand during incremental search.
-  bindkey -M isearch . self-insert 2>/dev/null
-fi
+  # Convert .... to ../.. automatically.
+  if zstyle -t ':omz:editor' dot-expansion; then
+    # Do not expand during incremental search.
+    bindkey -M "$keymap" -M isearch . self-insert 2>/dev/null
+  fi
 
-# Display an indicator when completing.
-[[ -n "$keyinfo[Control]" ]] && \
-  bindkey "$keyinfo[Control]I" expand-or-complete-prefix-with-indicator
+  # Display an indicator when completing.
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Control]I" \
+      expand-or-complete-prefix-with-indicator
 
-# Use a more flexible push-line.
-[[ -n "$keyinfo[Control]" && -n "$keyinfo[Escape]" ]] && \
-  for key in "$keyinfo[Control]Q" "$keyinfo[Escape]"{q,Q}; \
-    bindkey "$key" push-line-or-edit
+  # Insert 'sudo ' at the beginning of the line.
+  [[ -n "$keyinfo[Control]" ]] && \
+    bindkey -M "$keymap" "$keyinfo[Control]X$keyinfo[Control]S" prepend-sudo
+done
 
-# Insert 'sudo ' at the beginning of the line.
-[[ -n "$keyinfo[Control]" ]] && \
-  bindkey "$keyinfo[Control]X$keyinfo[Control]S" prepend-sudo
+# Set the key layout.
+zstyle -s ':omz:editor' keymap 'keymap'
+if [[ "$keymap" == (emacs|) ]]; then
+  bindkey -e
+elif [[ "$keymap" == vi ]]; then
+  bindkey -v
+else
+  print "omz: invalid keymap: $keymap" >&2
+fi
 
+unset keymap
 unset key