<canvas id="mainCanvas" width="1024" height="768" style="border:1px solid #000000;"></canvas>
<br />
<button onclick="mgmain.bringToCenter();">Center</button>
+<button onclick="mgmain.isFrozen = !mgmain.isFrozen;">Freeze</button>
<button onclick="mgmain.zoomIn();">+</button>
<button onclick="mgmain.zoomOut();">-</button>
<button onclick="mgmain.moveViewRelative(0, -10);">↑</button>
<button onclick="mgmain.moveViewRelative(0, 10);">↓</button>
<button onclick="mgmain.moveViewRelative(-10, 0);">←</button>
<button onclick="mgmain.moveViewRelative(10, 0);">→</button>
+<input id="identBox" type="text">
+<button onclick="mgmain.setIdentifierForSelectedNode(getElementById('identBox').value);">set</button>
</body>
</html>
\ No newline at end of file