So after some playing around I’ve figured out that
plus and
minus buttons on the phone screen during navigation control the amount of zoom in or out on the phone display and on the CarPlay unit. Once you’ve set it the CarPlay display stays that way. This excludes the auto zoom in settings (more on that later).
But let’s say that you want to change the degree of zoom from the CarPlay unit during a navigation. My phone is tucked away in a pocket. There is map adjustment button on the CarPlay display unit (bottom right hand corner), press that and the + & - buttons allow to zoom in or out. Great except once you press Done button it reverts back to whatever you set on the phone.
So please lovely people at MRA is it possible to adjust the degree of zoom from the CarPlay unit using the + / - control so the map zoom or scale stays as it does on the phone. Of course until you adjust the zoom again from either the phone or the CarPlay unit.