At present there is only one option to change both the rear speakers level at the same time but for a lot of people it would not be feasible to place the rear speakers at exactly the same position either side of the listener position
To rectify this options need to be added to set the level of the rear speakers individually for distance errors
This should be a simple addition to the next update
@Members_pmPnnYA: Thank you for your feedback. I will pass your suggestion on to our Research and Development Team, to see if this is something that can be implemented in future models or updates, and keep you posted with any news I receive.