The ability to set the contrast, gamma and color saturation for each map separately.
Online and offline maps often do not look good in terms of their color settings.
They may be too pale, with low contrast, or, conversely, too dark.
Some maps do not have enough saturation, etc.
All this worsens the perception of the map, particularly small details.
It would be very useful if 3 parameters - color saturation, gamma and contrast, could be set separately for each offline and online map.