tinymce-docs-4x/plugins/hr.md

layout, title, title_nav, description, keywords, controls

layout	title	title_nav	description	keywords	controls
default	Horizontal Rule Plugin	Horizontal Rule	Insert a horizontal line.	hr insert	toolbar button, menu item

The Horizontal Rule (hr) plugin allows a user to insert a horizontal rule on the page at the cursor insertion point. It also adds a toolbar button and a menu item Horizontal line under the Insert menu.

Type: String

Example

tinymce.init({
  selector: "textarea",  // change this value according to your HTML
  plugins: "hr"
});