I was having some fun with WordPress development lately.
In one of the tasks, I need to customize the post edit page by reading some wp-opitons information. The immediate thought is to use hook action or filter to attach some text or div right under rich text editor.
I did some search and here is the link I found. http://justintadlock.com/archives/2009/04/05/how-to-preset-text-in-the-wordpress-post-editor
From this link I also modified the solution to fit more what I need.
Here is the code to get started as shown below: (put this code under functions.php in selected theme)
For more information about this add_filter (richedit_pre) options, please visit: http://codex.wordpress.org/Plugin_API/Filter_Reference
Cheers and have fun with daily web application development.