Actually, in RSA you can change visibility icons to +,-,#. In class diagram, select the box you want to change, go to menu Diagram->Filters->Stereotype and visibility style| and select Visibility style:Text.
But i found a more stubborn issue in RSA, in sequence diagrams it always shows text on every msg as 1.1.1 <text> and i cannot find how to hide this sequence number, and this is forcing me to move to other UML tools having wasted lot of time creating class diagram in RSA

, if anyone happens to know solution to this, please do reply.
-Dev