add buttons and functions to tool-bar

lisp/my/my.el

@@ -313,14 +313,32 @@ print it in the message buffer."
   ;; https://emacs.stackexchange.com/questions/7375/can-i-format-cells-in-an-org-mode-table-differently-depending-on-a-formula
   (require 'ov)
 
-  (defun my-org-toggle-emphasis ()
+  (setq my-org-latex-preview nil)
+  (defun my-org-toggle-elements ()
     "Toggle hiding/showing of org emphasize markers."
     (interactive)
+    
     (if org-hide-emphasis-markers
         (set-variable 'org-hide-emphasis-markers nil)
       (set-variable 'org-hide-emphasis-markers t))
-    (org-mode-restart))
-  (define-key org-mode-map (kbd "C-c C-x C-e") 'my-org-toggle-emphasis)
+    (setq org-link-descriptive (not org-link-descriptive))
+    (org-restart-font-lock)
+    
+    (org-toggle-inline-images)
+
+    ;; (org-latex-preview)
+    (if my-org-latex-preview
+        ;; switch off
+        (let ()
+          (set-variable 'my-org-latex-preview nil)
+          (org-latex-preview '(64)))
+      ;; switch on
+      (set-variable 'my-org-latex-preview t)
+      (org-latex-preview '(16)))
+    
+    ;; (org-mode-restart)
+    )
+  (define-key org-mode-map (kbd "C-c C-x C-e") 'my-org-toggle-elements)
 
   (defun my-org-keywords ()
     "Parse the buffer and return a cons list of (key . value)