diff --git a/home/doomemacs/config.org b/home/doomemacs/config.org
index 0e91783..513e369 100644
--- a/home/doomemacs/config.org
+++ b/home/doomemacs/config.org
@@ -1,6 +1,8 @@
 #+TITLE: Doom Emacs Configuration File
 
-Execute ~doom sync~ after modifying this file to tangle it to ~config.el~.
+* Installation
+
+Execute ~doom sync~ after modifying this file to tangle it to ~config.el~. Install `lil`
 
 The following block of comments is from the default configuration.
 
@@ -221,7 +223,6 @@ numbers are disabled. For relative line numbers, set this to ~relative~.
 
 #+begin_src emacs-lisp
 (setq display-line-numbers-type 'relative)
-(global-display-line-numbers-mode)
 #+end_src
 
 ** Indentation Style Hooks
@@ -231,21 +232,22 @@ numbers are disabled. For relative line numbers, set this to ~relative~.
 	(setq
 		whitespace-style '(face spaces tabs newline trailing space-mark tab-mark newline-mark)
 		whitespace-line-column 80)
+	(display-line-numbers-mode)
 	(display-fill-column-indicator-mode)
-	;;(whitespace-mode)
 	(setq
 		indent-tabs-mode t
 		indent-line-function 'tab-to-tab-stop
 		tab-width 3)
 	(indent-tabs-mode)
 	(smart-tabs-mode-enable)
-	)
+)
 (defun custom/common-richtext-hook ()
 	(setq whitespace-style '(face spaces tabs newline trailing space-mark tab-mark newline-mark))
 	(setq whitespace-line-column nil)
-	)
+	(display-line-numbers-mode)
+)
 
-(add-hook 'text-mode-hook       #'custom/common-richtext-hook)
+(add-hook 'text-mode-hook #'custom/common-richtext-hook)
 #+end_src
 
 * Package-specific Settings
@@ -329,6 +331,7 @@ Note that ~onsave~ was intentionally turned off because it messes with version c
 		indent-line-function 'tab-to-tab-stop
 		tab-width 3)
 	(indent-tabs-mode)
+	(display-line-numbers-mode)
 	)
 (add-hook 'lisp-mode-hook       #'custom/lisp-family-hook)
 (add-hook 'lisp-data-mode-hook  #'custom/lisp-family-hook)
@@ -402,6 +405,9 @@ removed.
 The target indentation style of ~LaTeX~ is as follows:
 
 #+begin_src tex :tangle no
+\section{A section}
+% No indent here
+
 \begin{enumerate}[1.]
 \item Some item 1. Note that item is not indented.
 
@@ -455,7 +461,7 @@ introduced.
 	)
 #+end_src
 
-*** Lean
+*** Lean 4
 
 #+begin_src emacs-lisp :tangle packages.el
 (package! lean4-mode :recipe (
@@ -488,14 +494,17 @@ introduced.
 
 Add the necessary hooks for LilyPond mode.
 
+FIXME: Defer initialisation
+
 #+begin_src emacs-lisp
 (use-package! lilypond-mode
 	:init
-	(print! "Initializing LilyPond-mode")
-	(add-to-list 'auto-mode-alist '("\\.ly\\'" . LilyPond-mode))
+		(print! "Initializing LilyPond-mode")
+		(add-to-list 'auto-mode-alist '("\\.ly\\'" . LilyPond-mode))
+	;:after-call LilyPond-mode
 	:config
-	(add-hook 'LilyPond-mode-hook  #'custom/common-program-hook)
-	)
+		(add-hook 'LilyPond-mode-hook  #'custom/common-program-hook)
+)
 #+end_src
 
 ** Tools
@@ -531,24 +540,118 @@ addition. See [[https://emacs.stackexchange.com/questions/75827/doom-emacs-error
 
 #+begin_src emacs-lisp :tangle packages.el
 (package! transient
-      :pin "c2bdf7e12c530eb85476d3aef317eb2941ab9440"
-      :recipe (:host github :repo "magit/transient"))
+	:pin "c2bdf7e12c530eb85476d3aef317eb2941ab9440"
+	:recipe (:host github :repo "magit/transient"))
 (package! with-editor
-          :pin "bbc60f68ac190f02da8a100b6fb67cf1c27c53ab"
-          :recipe (:host github :repo "magit/with-editor"))
+	:pin "bbc60f68ac190f02da8a100b6fb67cf1c27c53ab"
+	:recipe (:host github :repo "magit/with-editor"))
 #+end_src
 
 *** Emacs IPython Notebook (ein)
 
-WIP
+Adapted from [[https://gist.github.com/millejoh/8632402a11384a3a0949fa350a1a271b]]
+
+Usage: Since ~ein:notebooklist-mode~, ~ein:markdown-mode~, and
+~ein:traceback-mode~ are major modes, their hotkeys are triggered by the local
+leader ~,~/~SPC m~. However the ~ein:notebook-mode~ and
+~ein:notebook-multilang-mode~ are minor modes and they are triggered by ~C-c~
+instead of ~,~.
+
+FIXME: Delete the emacs-esque keybinding from the maps.
 
 #+begin_src emacs-lisp
+(defun custom/ein:worksheet-merge-cell-next ()
+	(interactive)
+	(ein:worksheet-merge-cell (ein:worksheet--get-ws-or-error) (ein:worksheet-get-current-cell) t t))
 (map! :after ein
 	:localleader
-	:map ein:notebook-mode-map
-	(:prefix ("m" . "move")
-		:desc "Up"   "k" #'ein-markdown-move-up
-		:desc "Down" "j" #'ein-markdown-move-down
-		)
+	:map ein:notebooklist-mode-map ; Major mode
+	:desc "Reload"                 "r" #'ein:notebooklist-reload
+	:desc "Open"                   "o" #'ein:notebooklist-open
+	:desc "Prev item"              "k" #'ein:notebooklist-prev-item
+	:desc "Next item"              "j" #'ein:notebooklist-next-item
+	:desc "New notebook"           "n" #'ein:notebooklist-new-notebook
+	:desc "New notebook with name" "N" #'ein:notebooklist-new-notebook-with-name
+)
+(map! :after ein
+	:localleader
+	:map ein:markdown-mode-map ; Major mode
+	:desc "Up"      "K" #'ein:markdown-move-up
+	:desc "Down"    "J" #'ein:markdown-move-down
+	:desc "Promote" "H" #'ein:markdown-move-up
+	:desc "Demote"  "L" #'ein:markdown-move-down
+	:desc "Do"      "e" #'ein:markdown-do
+	:desc "Cycle"   "c" #'ein:markdown-cycle
+)
+(map! :after ein
+	:localleader
+	:map ein:traceback-mode-map ; Major mode
+	"RET" 'ein:tb-jump-to-source-at-point-command
+	"n" 'ein:tb-next-item
+	"p" 'ein:tb-prev-item
+	"q" 'bury-buffer
+)
+(map! :after ein
+	:map ein:notebook-mode-map ; Minor mode
+	:prefix "C-c"
+	;; Cell
+	:desc "Copy cell"          "y" #'ein:worksheet-copy-cell
+	:desc "Yank cell"          "p" #'ein:worksheet-yank-cell
+	:desc "kill cell"          "d" #'ein:worksheet-kill-cell
+	:desc "Insert below"       "i" #'ein:worksheet-insert-cell-below
+	:desc "Insert above"       "I" #'ein:worksheet-insert-cell-above
+	:desc "Goto next input"    "j" #'ein:worksheet-goto-next-input
+	:desc "Goto prev input"    "k" #'ein:worksheet-goto-prev-input
+	:desc "Move cell down"     "J" #'ein:worksheet-move-cell-down
+	:desc "Move cell up"       "K" #'ein:worksheet-move-cell-up
+	:desc "Change cell type"   "u" #'ein:worksheet-change-cell-type
+	:desc "Toggle output"      "t" #'ein:worksheet-toggle-output
+	:desc "Merge cell"         "C-k" #'ein:worksheet-merge-cell
+	:desc "Merge cell next"    "C-j" #'custom/ein:worksheet-merge-cell-next
+	:desc "Split cell"         "s" #'ein:worksheet-split-cell-at-point
+	:desc "Execute cell and goto next" "RET" #'ein:worksheet-execute-cell-and-goto-next
+	;; Output
+	:desc "Clear output"     "C-l"   #'ein:worksheet-clear-output
+	:desc "Clear all output" "C-S-l" #'ein:worksheet-clear-all-output
+	;; Notebook
+	:desc "Rename sheet"    "R" #'ein:worksheet-rename-sheet
+	:desc "Move prev"       "H" #'ein:notebook-worksheet-move-prev
+	:desc "Move next"       "L" #'ein:notebook-worksheet-move-next
+	:desc "Rename notebook" "C-r" #'ein:notebook-rename-command
+	:desc "Worksheet Delete" "-" #'ein:notebook-worksheet-delete
+	:desc "Close notebook"   "x" #'ein:notebook-close
+	:desc "Save notebook command" "fs" #'ein:notebook-save-notebook-command
+	(:prefix ("e" . "Execute")
+	 :desc "All cells"             "a" #'ein:worksheet-execute-all-cells
+	 :desc "All cells above"       "K" #'ein:worksheet-execute-all-cells-above
+	 :desc "All cells below"       "J" #'ein:worksheet-execute-all-cells-below
+	 :desc "Cell and go to next"   "RET" #'ein:worksheet-execute-cell-and-goto-next
+	 :desc "Cell and insert below" "j" #'ein:worksheet-execute-cell-and-insert-below
 	)
+	(:prefix ("o" . "Open")
+	 :desc "Console"       "c"   #'ein:console-open
+	 :desc "Prev or last"  "h" #'ein:notebook-worksheet-open-prev-or-last
+	 :desc "Next or first" "l" #'ein:notebook-worksheet-open-next-or-first
+	 :desc "Insert next"   "n" #'ein:notebook-worksheet-insert-next
+	 :desc "1"    "1" #'ein:notebook-worksheet-open-1th
+	 :desc "2"    "2" #'ein:notebook-worksheet-open-2th
+	 :desc "3"    "3" #'ein:notebook-worksheet-open-3th
+	 :desc "4"    "4" #'ein:notebook-worksheet-open-4th
+	 :desc "5"    "5" #'ein:notebook-worksheet-open-5th
+	 :desc "6"    "6" #'ein:notebook-worksheet-open-5th
+	 :desc "7"    "7" #'ein:notebook-worksheet-open-7th
+	 :desc "8"    "8" #'ein:notebook-worksheet-open-8th
+	 :desc "last" "9" #'ein:notebook-worksheet-open-last
+	)
+)
+(map! :after ein-multilang
+	:map ein:notebook-multilang-mode-map ; Minor mode
+	:prefix "C-c"
+	:desc "Execute cell"               "RET" #'ein:worksheet-execute-cell
+	:desc "Execute cell and goto next" "<C-return>" #'ein:worksheet-execute-cell-and-goto-next
+	:desc "Goto next input" "gj" 'ein:worksheet-goto-next-input
+	:desc "Goto prev input" "gk" 'ein:worksheet-goto-prev-input
+	:desc "Move cell down"  "M-j" 'ein:worksheet-move-cell-down
+	:desc "Move cell up"    "M-k" 'ein:worksheet-move-cell-up
+)
 #+end_src
diff --git a/home/doomemacs/init.el b/home/doomemacs/init.el
index e3d7ab1..2eac0e6 100644
--- a/home/doomemacs/init.el
+++ b/home/doomemacs/init.el
@@ -146,7 +146,7 @@
        ;;julia             ; a better, faster MATLAB
        ;;kotlin            ; a better, slicker Java(Script)
        (latex +latexmk +lsp) ; writing papers in Emacs has never been so fun
-       ;;lean              ; for folks with too much to prove
+       lean              ; for folks with too much to prove
        ledger            ; be audit you can be
        ;;lua               ; one-based indices? one-based indices
        markdown          ; writing docs for people to ignore
@@ -184,7 +184,7 @@
        :app
        calendar
        emms
-       everywhere        ; *leave* Emacs!? You must be joking
+       ;;everywhere        ; *leave* Emacs!? You must be joking
        ;;irc               ; how neckbeards socialize
        ;;(rss +org)        ; emacs as an RSS reader
        ;;twitter           ; twitter client https://twitter.com/vnought