e information can be found in the <a href="../intro/toolTips.html">GoJS Intro</a>.
</p>
            <p>
              <a href="../samples/index.html#tooltips">Related samples</a>
            </p>
            <hr>
          
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            <h4>Buttons</h4>
<p>
GoJS defines several <a href="../api/symbols/Panel.html" target="api">Panel</a>s for common uses.
These include "Button", "TreeExpanderButton", "SubGraphExpanderB