This plugin allows a user to see block level elements in the editable area. It is similar to WYSIWYG hidden character functionality, but at block level. It also adds a toolbar button and a menu item Show blocks under the View menu dropdown.
tinymce.init({
selector: 'textarea', // change this value according to your HTML
plugins: 'visualblocks',
toolbar: 'visualblocks'
});This setting affects the execution of the visualblocks plugin. You may specify whether blocks are visible by default here.
The Visual Blocks plugin provides the following {productname} command.