Add ivy-hydra.

init.d/misc/completion.el

@@ -10,6 +10,7 @@
 (require 'basics/global-variables)
 (require 'basics/appearance)
 (require 'misc/libs)
+(require 'basics/input)
 
 ;; Completion in many Emacs commands.
 (use-package ivy
@@ -55,6 +56,10 @@
   :custom (ivy-prescient-retain-classic-highlighting t)
   :hook (after-init . ivy-prescient-mode))
 
+;; C-o shows additional options.
+(use-package ivy-hydra
+  :after (ivy))
+
 ;; Autocompletion mode with many plugins.
 (use-package company
   :unless slow-computer