A method of operating a device for adjusting display level properties across multiple display devices, the device comprising: a memory configured to store instructions providing an operating system, and at least one processor coupled to the memory and configured to execute the instructions; the method comprising, by the device: receiving, for each of multiple display devices, one or more ranges of display brightness capability values that are supported by a given display device of the multiple display devices; receiving a first ambient light value representing first ambient light conditions near a first one of the multiple displays; receiving a second ambient light value representing second ambient light conditions near a second one of the multiple displays; generating, for each of the multiple display devices, mapped display brightness capability values, by mapping at least a portion of display brightness capability values in the one or more ranges of display brightness capability values of the display device to selectable brightness levels available in the operating system; applying, for the first one of the multiple displays, a first nits transform to the mapped display brightness capability values of the first one of the multiple displays based at least in part on the first ambient light value; applying, for the second one of the multiple displays, a second nits transform to the mapped display brightness capability values of the second one of the multiple displays based at least in part on the second ambient light value; determining one of the selectable brightness levels selected via the operating system; determining, for each of the multiple display devices, a corresponding display brightness capability value mapped to the one of the selectable brightness levels; and indicating, to each of the multiple display devices, the corresponding display brightness capability value. the device comprising: a memory configured to store instructions providing an operating system, and at least one processor coupled to the memory and configured to execute the instructions; the method comprising, by the device: receiving, for each of multiple display devices, one or more ranges of display brightness capability values that are supported by a given display device of the multiple display devices; receiving a first ambient light value representing first ambient light conditions near a first one of the multiple displays; receiving a second ambient light value representing second ambient light conditions near a second one of the multiple displays; generating, for each of the multiple display devices, mapped display brightness capability values, by mapping at least a portion of display brightness capability values in the one or more ranges of display brightness capability values of the display device to selectable brightness levels available in the operating system; receiving, for each of multiple display devices, one or more ranges of display brightness capability values that are supported by a given display device of the multiple display devices; receiving a first ambient light value representing first ambient light conditions near a first one of the multiple displays; receiving a second ambient light value representing second ambient light conditions near a second one of the multiple displays; generating, for each of the multiple display devices, mapped display brightness capability values, by mapping at least a portion of display brightness capability values in the one or more ranges of display brightness capability values of the display device to selectable brightness levels available in the operating system; applying, for the first one of the multiple displays, a first nits transform to the mapped display brightness capability values of the first one of the multiple displays based at least in part on the first ambient light value; applying, for the second one of the multiple displays, a second nits transform to the mapped display brightness capability values of the second one of the multiple displays based at least in part on the second ambient light value; determining one of the selectable brightness levels selected via the operating system; determining, for each of the multiple display devices, a corresponding display brightness capability value mapped to the one of the selectable brightness levels; and indicating, to each of the multiple display devices, the corresponding display brightness capability value. determining one of the selectable brightness levels selected via the operating system; determining, for each of the multiple display devices, a corresponding display brightness capability value mapped to the one of the selectable brightness levels; and indicating, to each of the multiple display devices, the corresponding display brightness capability value.