HI, Not used H13, but the H14 camera ‘View’ tab has: - Screen Window X/Y - Screen Window Size You can drag and drop these into the viewport to create virtual sliders. Now you can easily zoom and pan around in your camera view with a background.
CTRL+MMB on the parameter label in the View tab will reset all to the default value. To link the ‘Window Size’ values, drag one on top of the other and choose ‘channel reference’. It would be nice to have this more like in SI, but this works for me too. Hope this helps, rob.