On the latest cutting edge build, when the preview bar at the bottom of the main window is minimized, it has a pure black fill which obscures the tools/options unless they’re in a colored state as seen below. Functionality is there, I just have to click around aimlessly while looking for the Eye icon.
Same toolbar when not minimized
While I have your attention, also in the Dark UI, how can I change the color of the +B ground . Switching to this view, full screen, at night is somewhat jarring and very difficult to see the path itself. I ask about the ground color because of the jarring transition, knowing that the path color could also be an option: