Child frames and Popups

An often requested feature is the ability to display the completions in a child frame popup. Personally I am critical of using child frames for minibuffer completion. From my experience it introduces more problems than it solves. Most importantly child frames hide the content of the underlying buffer. Furthermore child frames do not play well together with changing windows and entering recursive minibuffer sessions. On top, child frames can feel slow and sometimes flicker. A better alternative is the vertico-buffer display which can even be configured individually per command using vertico-multiform. On the plus side of child frames, the completion display appears at the center of the screen, where your eyes are focused. Please give the following packages a try and judge for yourself.

• mini-frame: Display the entire minibuffer in a child frame.
• mini-popup: Slightly simpler alternative to mini-frame.
• vertico-posframe: Display only the Vertico minibuffer in a child frame using the posframe library.