How does the save button work?

Hi all

I am brand new to this amazing application. So far I love it.

My current development is a simple multi-lingual web page here in France for a hotel. I have embedded the editor page in a <textarea> inside a <form> which sits inside a <td> in a table.

I use PHP on the server side and - as you would expect an <input type="submit" button to send the form back to the same script inside the "admin area" web page where users edit the texts for eventual display on the public site. This script saves it to a MySQL table.

And it all works well.

But there is a "save" button inside the menus in the editor. Is there a way I can use that to close and submit the form instead of the "submit" button? Much more elegant. But how does the button work?

I have hunted through the documentation but not seen anything yet. Is there a general documentation area that I can read up on all of the buttons. I have seen the config file and the include - exclude buttons bit, but that is all.