WYSIWYG ?

Why wouldn't it work? Have you tried and found a problem?

I can not get it to work either. I use the wysiwyg API module and integrated CKEditor and tinyMCE. Neither show up when I say edit on a section. How do I configure them to make them also work on editing a section?

Most likely, the special section editing form is missing some elements WYSIWYG uses to insert the wysiwyg editor into the text area. If so, this module's edit_section_form() function will need to be modified to play nice with WYSIWYG.

There are advanced settings for most WYSIWYG editors that let you configure them to behave pretty much as you wish (within their limitations). I've used two or three editors in Drupal, and now prefer CKEditor, which is fairly full-featured, and I think it allows one to add specific block elements like the edit_section_form() function mentioned by Grayside. The thing I learned the hard way about CKEditor is it's somewhat involved to install... there is a decent video at http://www.youtube.com/user/beparadigm#p/a/u/1/1suHskbL1pE and a more-current tutorial at http://drupal.org/node/728210 that explain how to wrap the latest version in the Drupal mod before uploading it to your server. If you use it, you'll probably also want to check/modify settings in its Advanced admin page to make it friendly for your application.

so the solution is to implement ckeditor or others? most of use use wysiwyg i think.
and yes the editor is not loading here, too.

Implementing a rich-text editor proved a fairly involved process... after getting the third solution (CKEditor) working with some (expensive) very-skilled 3rd-party help, I can only offer sympathy other than the tutorial info. posted above. It's not a no-brainer, takes some wrangling and patience, but the payoff is worth it. Good luck and stay motivated.