Topics can be represented by different shapes:

1. •Rectangle
   

2. •Rounded Rectangle
   

3. •Oval
   

4. •Line
   

By default, new topics will inherit their shape from their parent (or sibling) unless set explicitly.

The new shape can be applied to child topics - resulting in the layout being adjusted to account for any change in topic size.

NB: The shape attribute is not translated into OPML (as shapes are not currently supported in that format.)