ance the toolbar array in your conf/userscript.js file(you need to create this file).
Eg. if you want a button for the subscript sy... ); /* array[key]= insertion string , value = icon filename. */
notes_arr['<note></note>\\n']='note.png...
This can be done by editing the inc/toolbar.php file directly. Around line 27, you will find the follo... ng around with it, cacheing was tricky. I had to keep manually deleting the cached version of the file.