Hi Allen! Unfortunately, the problem usually lies in the map choice. Explorer mode basically removes color and darkens the map in the explored areas, Some maps lend themselves well to the treatment, others which may be darker and less color saturated will tend to be more difficult to use. Other than brightening the monitor or asking the GM to tweak the map image, there might be little you can do. You could ask the GM to employ Light Crumbs in carefully chosen areas.