On the file editores.php there is a list of buttons:
$editor500->botoes[40] =
0; (Font type)
$editor500->botoes[41] = 0;
(Size)
$editor500->botoes[20] = 0; (Text colour)
Usually these are always 0 (they're not visible). In order for them to appear on the advanced editor, the value must be 1.