jit.gl.render multiple outputs

Hi all,
I need to monitor the signal I'm sending to my projector output on my patch, I tought it could be done with a jit.pwindow? or multiplying the jit.window output on my main screen, is that possible? when I create a new window or pwindow I cannot duplicate the name of the render context so I can see the same signal in both windows, what I'm doing wrong?

any tought would be much appreciated!