Examples:
Simple
Custom buttons
Buttons manipulation
Custom settings
Custom functions

mark_it_up

Simple example

Code used

show layout code

  
  <% content_for :head do %>
  
    <%= mark_it_up "#miu_test" %>
  
  <% end %>
  
  
  
  <% form_tag do %>
  
    <%= text_area_tag "miu_test" %>
  
  <% end %>
  

For more info see http://github.com/cingel/mark_it_up