add popper package

emacs.d/ui.el

@@ -141,3 +141,19 @@
    ("M-s L" . consult-line-multi))
   :config
   (setq consult-narrow-key "<"))
+
+(use-package popper
+  :ensure t
+  :bind
+  (("C-`" . popper-toggle)
+   ("M-`" . popper-cycle)
+   ("C-M-`" . popper-toggle-type))
+  :init
+  (setq popper-reference-buffers
+        '("\\*Messages\\*"
+          "Output\\*$"
+          "\\*Async Shell Command\\*"
+          ;;help-mode
+          compilation-mode))
+  (popper-mode t)
+  (popper-echo-mode t))