I'd like to, when i click in "save" to change the content, i message would appear in somewhere the admin page that the saving was successfull, there is some way to do that?
Hi and welcome @pietrofxq,
I'm afraid not, unless you don't mind digging in PHP files to add this.
Please see viewtopic.php?f=4&t=7789&p=12639 for a related discussion.
Would a button such as those at http://lab.hakim.se/ladda/ be sufficient for you in communicating the same thing?