It's possible to directly customize labels from model explorer

For example to have:

* Only the name
* The entire label with the stereotype, the metaclass and name
* the actual label
* the name, the stereotype in cold grey color.

By default, the customized label is not activate. To activate click at the icon "Customize Model Explorer". Add CustomizableUMLLabel to loaded customization then move it to the top of the list for the highter priority. Validate Changes. Then clic on "Customize UML Label..." to customize the label visualization:

Customize labels from embedded preferences in your product application

In your plugin_customization.ini file:

##Ensure facet is loading in the right order
org.eclipse.papyrus.infra.ui.emf/defaultLoadedFacet=platform\:/plugin/org.eclipse.papyrus.uml.modelexplorer/resource/CustomizableUMLLabel.custom,platform\:/plugin/org.eclipse.papyrus.infra.gmfdiag.modelexplorer/resources/PapyrusDiagram.custom,platform\:/plugin/org.eclipse.papyrus.views.modelexplorer/resources/ReadOnlyElement.custom,platform\:/plugin/org.eclipse.papyrus.uml.modelexplorer/resource/StereotypeDisplay.custom,platform\:/plugin/org.eclipse.papyrus.infra.nattable.modelexplorer/resources/PapyrusTable.custom,platform\:/plugin/org.eclipse.papyrus.uml.modelexplorer/resource/SimpleUML.custom

##Ensure we use the good type
org.eclipse.papyrus.uml.modelexplorer/CustomizedTypes=label