View disance with OpenGL Viewer in QuArk

Hi guys,
I'm using the OpenGL view while working with my model. It works fine but the view frustum does not seem to look out far enough. I have to always zoom close to my model in order to see it. Since it's a big building, I cannot zoom out to see the whole thing otherwise the entire screen turns black. Is there a way to adjust the frustum so the depth is further?

Thanks!