1. Click this
icon at the right side of an attribute.
2. A Topic Tree is displayed in the right window.
3. By clicking a topic you transfer it into a dimension attribute in Registration form.
Note: if you browse the cursor over the topic you get hint wit a number how many times the topic was assigned in this agenda (History notes included).
Note 2: Some topic are just "dummy" topics, i.e. used for better understanding of e.g. topic tree sections. These are not designed to be assigned to Cards).
