Leatrix Maps improves the world map in Wow Classic. You can reveal the map, show dungeons and travel points, show zone levels and coordinates, scale and position the map, remove the border, set map opacity, enable zoom, enable class colored group icons, enhance the battlefield map and more. All settings are optional.
Enter /ltm to open Leatrix Maps. Some options have little configuration buttons next to them for further configuration. If you are looking for Leatrix Maps for Shadowlands, it's here.