Help - Registration form (RForm)

How to create a new card ? How to select a topic from the dictionary ? How to select a topic from the topic tree ? Can I assign more topics than 1 into a dimension ? How can I delete a selected topic ? How can I re-assing previously assigned topics with an existing card ? How can I delete an existing card ? How does search in WEX Mapping Manager work ? I want to ask something else. Where can I turn to ?