It would be very useful to have a "Selected Only" button to render in the IPR only the objects selected by the user - ie. this button must be outside of the IPR itself for it to run with the "Selected Only" preset function. And now you must first start the IPR, which starts loading the entire scene, at this time press "Selected only", then restart the IPR. This is not very convenient. Maybe along with the "Open IPR" button to make the "Open IPR for selected only" button?
Thank's.