Open Link in a New Window (with Height & Width defined)

[Initiostar]

Is there an easy way within the Xara Link Dialogue box to extend Open Link: "_blank" to include attributes such as height="960px",width="480px"? This allows the window in window you can see in the picture without the need to manually resize the browser.

I can create a placeholder that is replaced with a button link and script to achieve this, but my guess is there should be easier alternative customisable button?

Thanks,

Gary