Hi @ale,
The span/rel toggle is not supported yet in the review UI which is a much older workflow than the relations. It's very easy to work around it though - could you try the following solution:
The easiest solution would be to just put a
prodigy.jsonin your current working directory and put a"relations_span_labels": []in it, containing your span labels. This should overwrite the default and make your span labels available to the interface.
The source thread: Review NER + Relation annotations jointly - #2 by ines