Enabling Preview of Moderated Images in Dashboard

The image content type definition must have a representation field dashboardreps containing two representations named thumb and preview along with the parameter and fields discussed above in order to show the moderated images in Dashboard. Define the representation field like this:

      <field name="dashboardreps" type="basic" mime-type="application/json">
        <ui:hidden/>
        <representations xmlns="http://xmlns.escenic.com/2009/representations" type="image-versions">
          <representation name="preview">
            <output width="400" height="300"/>
            <crop/>
            <resize/>
          </representation>
          <representation name="thumb">
            <output width="100" height="100"/>
            <crop/>
            <resize/>
          </representation>
        </representations>
      </field>