To see the best quality topographic maps, please change the base map to "t4 Topo High" for the USA, "t5 Canada" or "t8 Topo OSM Cycle" for everywhere else. You have to zoom in before the topo lines and UTM grid appears. Use the Menu button to toggle the UTM grid on/off. Use this link to view the map full screen: http://www.mappingsupport.com/p/gmap4.php?coord=utm. This link will work in most browsers on most devices including smartphones.
The map is displayed by the Gmap4 enhanced Google map viewer. For more information, please visit the Gmap4 homepage.