WordPress editor supports inserting images from the clipboard, but the pictures are bad Data:URL type.
This plugin converts image files in PNG format on a server.
Insert a copy of the windows screen in the post or page – a good example for the use of this plugin.
It is very comfortable.
<h3>Arbitrary section 1</h3>

Save Data:URL images

WordPress editor supports inserting images from the clipboard, but the pictures are bad Data:URL type.

Takashi Kitajima

MW Theme URI Shortcode to make a shortcord outputting theme directory uri. 
shortcode : [template_directory_uri], [stylesheet_directory_uri]
When you switches Visual to Text, replaced into shortcode. 
When you switches Text to Visual, shortcode replaced into theme uri. 
IF you don’t use child theme, there are cases where [stylesheet_directory_uri] replaces [template_directory_uri]

MW Theme URI Shortcode

MW Theme URI Shortcode to make a shortcord outputting theme directory uri.

Save Data:URL images vs MW Theme URI Shortcode