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Any one has any luck for it?
It has been full screen for exactly 2 weeks before it changed to split screen. I was told by the dealer who sold me the car the full screen wasn't intended actually. Unbelievable answer as it was the condition sold to me with full screen. And after 2 weeks then Lexus told customer it changed. Was it a trick or false info?
If you're talking about the map function in full screen, there is a button on the top right corner i believe that will close the split screen and show the entire maps. I'll update with a photo later if you still find it..
Why is there another thread? If this really bugs you, swing by the dealership and jump into another IS with Nav. I remember the RX, GS, LS does not have a full-screen backup. Also, someone posted an insert from the owner's manual.
According to the 2017 IS nav manual (same for 2018), the only screens that can be displayed full screen on the 10.3 inch display are: Initial screen, Menu Screen and Map Screen. Page 399, online 2017 IS Owner's Manual. Other useful information about display settings in the online 2017 IS Navigation Manual, page 296.