Sometimes it's easier to read content if it's inverted or in dark mode. For example, I inverted an old land survey in GIMP the other day and it was much easier to read—I noticed some details I had missed previously.
I suspect some Pro maps would be easier to explore and read if the colors were inverted. Could an option be added to temporarily invert map colors in the map pane? It would just be enabled while exploring a specific area in the map. I'd disable it when done.
Source: @AlfredBaldenweck 's comment in Temporarily invert image colors for dark mode georeferencing.
Maybe not what you're thinking of, but I think this would be a great addition to the View tab to just invert the entire map.