You may want copy & paste images just like Microsoft Word, you can simply do it by adding paste in plugin and paste_as_text=true, paste_as_image=true.
<!DOCTYPE html> <html> <header> <title>TEST</title> <link rel="stylesheet" type="text/css" href="/css/content.css"/><header> <script src="/js/tinymce/tinymce.min.js" referrerpolicy="origin"></script> <script> tinymce.init({ selector:'textarea', content_style: 'body { font-size: 10pt; font-family: 맑은 고딕체,Calibri,Arial,Sans-serif;; }', plugins: 'nonbreaking autoresize paste', nonbreaking_force_tab: true, forced_root_block: false, autoresize_on_init: false, paste_as_text: true, paste_as_image: true, resize: 'both' }); }); </script> </header> <body> <texarea cols=60 rows=10> Try paste image from your clipboard </textarea> </body> </html>