Update README.md

README.md

@@ -18,6 +18,7 @@ The author is using **[minimal-emacs.d](https://github.com/jamescherti/minimal-e
 - [Customizations](#customizations)
     - [How to customize early-init.el and init.el?](#how-to-customize-early-initel-and-initel)
     - [Reducing clutter in `~/.emacs.d` by redirecting files to `~/emacs.d/var/`](#reducing-clutter-in-emacsd-by-redirecting-files-to-emacsdvar)
+    - [How to enable dialogs, context menu, tool-bar, menu-bar, and tooltips?](#how-to-enable-dialogs-context-menu-tool-bar-menu-bar-and-tooltips)
     - [How to activate recentf, savehist, saveplace, and auto-revert?](#how-to-activate-recentf-savehist-saveplace-and-auto-revert)
     - [Optimization: Native Compilation](#optimization-native-compilation)
     - [Optimization: How to activate the Garbage Collector Magic Hack (gcmh-mode)](#optimization-how-to-activate-the-garbage-collector-magic-hack-gcmh-mode)
@@ -27,10 +28,12 @@ The author is using **[minimal-emacs.d](https://github.com/jamescherti/minimal-e
     - [Configuring LSP Servers with Eglot (built-in)](#configuring-lsp-servers-with-eglot-built-in)
     - [Code completion with corfu](#code-completion-with-corfu)
     - [How to configure straight.el?](#how-to-configure-straightel)
+    - [Which other packages can be interesting to add?](#which-other-packages-can-be-interesting-to-add)
 - [Frequently asked questions](#frequently-asked-questions)
     - [How to increase gc-cons-threshold?](#how-to-increase-gc-cons-threshold)
     - [How to change the outline-mode or outline-minor-mode Ellipsis (...) to (▼)?](#how-to-change-the-outline-mode-or-outline-minor-mode-ellipsis--to-)
     - [How to run the minimal-emacs.d Emacs configuration from another directory?](#how-to-run-the-minimal-emacsd-emacs-configuration-from-another-directory)
+    - [How to make minimal-emacs.d use an environment variable for changing ~/.emacs.d to another directory?](#how-to-make-minimal-emacsd-use-an-environment-variable-for-changing-emacsd-to-another-directory)
     - [Are post-early-init.el and pre-init.el the same file in terms of the logic?](#are-post-early-initel-and-pre-initel-the-same-file-in-terms-of-the-logic)
 - [Author and license](#author-and-license)
 - [Links](#links)
@@ -629,6 +632,23 @@ emacs --init-directory ~/.config/minimal-emacs.d/
 
 This allows you to keep your Emacs setup organized in a specific location and easily switch between different configurations.
 
+### How to make minimal-emacs.d use an environment variable to change ~/.emacs.d to another directory?
+
+Add the following to the top of the `~/.emacs.d/pre-early-init.el` file to make `minimal-emacs.d` use the `MINIMAL_EMACS_USER_DIRECTORY` environment variable to change `~/.emacs.d` to another directory:
+```emacs-lisp
+;; Place this at the very beginning of pre-early-init.el
+(let ((previous-minimal-emacs-user-directory (expand-file-name
+                                              minimal-emacs-user-directory))
+      (env-dir (getenv "MINIMAL_EMACS_USER_DIRECTORY")))
+  (setq minimal-emacs-user-directory (if env-dir
+                                         (expand-file-name env-dir)
+                                       (expand-file-name user-emacs-directory)))
+  (unless (string= minimal-emacs-user-directory
+                   previous-minimal-emacs-user-directory)
+    ;; Load pre-early-init.el from the new directory
+    (minimal-emacs-load-user-init "pre-early-init.el")))
+```
+
 ### Are post-early-init.el and pre-init.el the same file in terms of the logic?
 
 During the execution of `early-init.el` (and `pre-early-init.el` and  `post-early-init.el`), Emacs has not yet loaded the graphical user interface (GUI). This file is used for configurations that need to be applied before the GUI is initialized, such as settings that affect the early stages of the Emacs startup process.