layout.tipOverTreeStartLevel Number (default: 0)

Specifies the start level when the subtype is tipOver.

Example - set the tipOver layout start level

<div id="diagram"></div>
<script>
  $("#diagram").kendoDiagram({
    dataSource: {
      data: [{
        items: [{
          items: [{
            items: [{}, {}, {}]
          }, {
            items: [{}, {}, {}]
          }, {
            items: [{}, {}, {}]
          }]
        }]
      }]
    },
    layout: {
      type: "tree",
      subtype: "tipover",
      tipOverTreeStartLevel: 1
    },
    shapeDefaults: {
      width: 40,
      height: 40
    }
  });
</script>