Hi Corinne,

I'm new to Nuxeo, so hopefully I have not misunderstood your question. If someone knows of a better approach ('simplest way') please let me know.

I think you are talking about the tabs as shown here:

There are two action tabs: TAB_RELATIONS and TAB_PUBLISH

There is also an order number associated with each.

By default these numbers are 55 and 53.

In Studio, I added the following under Advanced Settings->XML Extensions, swapping the order numbers.

<require>org.nuxeo.ecm.platform.actions</require>
<extension target="org.nuxeo.ecm.platform.actions.ActionService" point="actions">
    <action id="TAB_PUBLISH" link="/incl/tabs/document_publish.xhtml"
      order="55" label="action.publish.content" icon="/icons/file.gif" type="rest_document_link">
      <category>VIEW_ACTION_LIST</category>
      <filter-id>publish_document</filter-id>
      <filter-id>mutable_document</filter-id>
    </action>   
    <action id="TAB_RELATIONS" link="/incl/tabs/document_relations.xhtml"
      enabled="true" label="action.view.relations" order="53" type="rest_document_link">
      <category>VIEW_ACTION_LIST</category>
      <filter id="view_relations">
        <rule grant="true">
          <permission>Read</permission>
        </rule>
        <rule grant="false">
          <facet>Folderish</facet>
            </rule>
            <rule grant="false">
              <type>Server</type>
            </rule>
      </filter>
    </action>  
</extension>

After doing that, I see:

So, the tabs are swapped/reordered. But maybe you are asking instead how to push both these tabs to the far right? The right-most displayed tab is TAB_MANAGE and it has an order number of 240.

Changing the settings for the order values for TAB_PUBLISH and TAB_RELATIONS to 305 and 310, I get the following: