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="http://kurapa.com/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>