I'd like to remove the labels for target nodes only (i.e. keep the labels for the source nodes). Style>Edit>Remove Mappings from selected Visual Properties
removes the labels for both, target and source nodes.
Thanks
Unfortunately, there is no way to do that directly :-( You could create a column and copy over labels if that node is a source node and then point your mapping to that column, but that could be a fairly big hassle.