Depending on what your BMW head unit is, you can code the car to display the BMW interface with split screen options, as it would for the 8.8" screen.
Can only be done on certain cars though. You need to have HU_ENTRYNAV (confusingly there are two versions of ENTRYNAV, with and without navigation). You may be able find out what you should have here: https://www.bimmer-tech.net/blog/item/101-basic-bmw-navigation but might be worth confirming elsewhere too.
My car is a late 2014 manufacture and came with HU_ENTRYNAV without navigation. I swapped my screen out for a 10.25" Android one and coded the BMW HU to give me split screen and full screen display and it works great![]()
Do you mean so I can see the old BMW interface as well as the new android one? I felt the original interface was pretty redundant without a navigation part to it so dont really see the need to have it active, can always just press menu to go back to it if I want to use it.