You can add this item with Inline Shortcode:

Default code:

																											[alert style="warning"]Insert your content here[/alert]
																										

Example of this shortcode below:

																										[alert style="warning"] Warning message. This is a
																										
																											sample link
																										
																										[/alert]
																									

																										[alert style="error"] Error message. This is a
																										
																											sample link
																										
																										[/alert]
																									

																										[alert style="info"] Info message. This is a
																										
																											sample link
																										
																										[/alert]
																									

																										[alert style="success"] Success message. This is a
																										
																											sample link
																										
																										[/alert]