WebVOWL currently treats domain classes in a different way than range classes. For the following example:
prefix : <https://example.com/>
:simple
rdfs:domain :From;
rdfs:range :To.
WebVOWL will display the :To class but not the :From class.
Expected: classes specified in domain and range to be treated/visualized in a similar way.
Workaround: add at least one statement about the :From class (e.g., :From a owl:Class).