[TYPO3-RTE] Tableproperties: How can I display the selector box for css-classes?

[Christopher]

Hello together,

I want to configure the RTE so that my editors can choose from 2 classes for 
the tables:
One with border and one without.

The problem is that I do not see a box in which this could be selected: In 
the menu "tableproperties" there is only the "description" with the fields 
"title" and "summary".

How can I get the selector there?

Christopher

PS: I configured the RTE using the "typical"-settings.