How to control the UI and OnGUI elements display order?

I have found a way, but requires setting canvas.RenderMode to WorldSpace and setting a separate camera to render the canvas. The steps are:

1.Setup the canvas.RenderMode to WorldSpace

2.Place an aditional camera to the scene with:

• Clear Flags set to Depth Only

• Culling Mask set to UI 3.Uncheck UI in the MainCamera Culling Mask

4.At the end end of the OnGUI function put: additionalCamera.Render();

All that results in canvas being rendered on the top of OnGUI elements