diff --git a/README.org b/README.org
index 012c407..54f4b9a 100644
--- a/README.org
+++ b/README.org
@@ -1222,6 +1222,7 @@ let
       <<emacs-plantuml-package>>
 
       # User interface packages.
+      <<emacs-neotree-package>>
       <<emacs-swiper-package>>
       <<emacs-desktop-package>>
       <<emacs-doom-themes-package>>
@@ -1304,6 +1305,7 @@ When Emacs is started, it normally tries to load a Lisp program from an ititiali
 <<emacs-desktop-elisp>>
 
 ;; User interface.
+<<emacs-neotree-elisp>>
 <<emacs-swiper-elisp>>
 <<emacs-transparency-elisp>>
 <<emacs-doom-themes-elisp>>
@@ -1763,10 +1765,10 @@ epkgs.multi-vterm
 ;; Add keybindings for interacting with the shell(s).
 (dotfiles/leader
   "v" '(:ignore t :which-key "VTerm")
-  "vn" '(multi-vterm :which-key "VTerm")
+  "vj" '(multi-vterm :which-key "New")
   "vl" '(multi-vterm-next :which-key "Next")
   "vh" '(multi-vterm-prev :which-key "Previous")
-  "vp" '(multi-vterm-project :which-key "Project")
+  "vk" '(multi-vterm-project :which-key "Project")
   "vv" '(multi-vterm-dedicated-toggle :which-key "Dedicated"))
 #+END_SRC
 
@@ -2530,7 +2532,9 @@ The [[https://microsoft.github.io/language-server-protocol][Language Server Prot
 (dotfiles/leader
   "l" '(:ignore t :which-key "LSP")
   "ll" '(lsp :which-key "LSP")
-  "lr" '(lsp-rename :which-key "Rename"))
+  "lr" '(lsp-rename :which-key "Rename")
+  "lf" '(lsp-format-buffer :which-key "Format")
+  "lo" '(lsp-organize-imports :which-key "Organize"))
 #+END_SRC
 
 *** CCLS
@@ -2757,6 +2761,21 @@ epkgs.plantuml-mode
       org-plantuml-exec-mode 'plantuml)
 #+END_SRC
 
+*** Neotree
+
+#+NAME: emacs-neotree-package
+#+BEGIN_SRC nix
+epkgs.neotree
+#+END_SRC
+
+[[https://github.com/jaypei/emacs-neotree][Emacs Neotree]] is an Emacs tree plugin similar to NerdTree for Vim.
+
+#+NAME: emacs-neotree-elisp
+#+BEGIN_SRC emacs-lisp
+(dotfiles/leader
+  "tr" '(neotree-toggle :which-key "Neotree"))
+#+END_SRC
+
 *** Swiper
 
 #+NAME: emacs-swiper-package
@@ -2798,8 +2817,8 @@ It's possible to control the frame opacity in [[https://gnu.org/software/emacs/]
 #+NAME: emacs-transparency-elisp
 #+BEGIN_SRC emacs-lisp
 ;; Configure the default frame transparency.
-(set-frame-parameter (selected-frame) 'alpha '(95 . 95))
-(add-to-list 'default-frame-alist '(alpha . (95 . 95)))
+(set-frame-parameter (selected-frame) 'alpha '(85 . 85))
+(add-to-list 'default-frame-alist '(alpha . (85 . 85)))
 #+END_SRC
 
 *** Desktop Environment
diff --git a/docs/images/background-new.jpg b/docs/images/background-new.jpg
new file mode 100644
index 0000000..5cd6b64
Binary files /dev/null and b/docs/images/background-new.jpg differ
diff --git a/modules/emacs.nix b/modules/emacs.nix
index 94ee5a3..1aae27b 100644
--- a/modules/emacs.nix
+++ b/modules/emacs.nix
@@ -65,6 +65,7 @@ let
       epkgs.plantuml-mode
 
       # User interface packages.
+      epkgs.neotree
       epkgs.ivy
       epkgs.counsel
       epkgs.ivy-rich