odoo-survey-addons/survey_custom_matrix/views/survey_question.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

  <record id="survey_question_form" model="ir.ui.view">
    <field name="name">survey_custom_matrix survey.question form</field>
    <field name="model">survey.question</field>
    <field name="inherit_id" ref="survey.survey_question_form"/>
    <field name="arch" type="xml">
      <xpath expr="//notebook//page//field[@name='labels_ids']//tree" position="inside">
        <field name="type"/>
        <field name="value_ids" widget="many2many_tags" attrs="{'invisible': [('type', '!=', 'dropdown')]}"/>
      </xpath>
    </field>
  </record>

</odoo>