Astro 320 and DC40 Owner’s Manual 31NavigationMeasuring DistanceYou can measure the distance betweentwo points.1. Press MAP > MENU.2. Select Measure Distance.An arrow appears at your currentlocation.3. Move the arrow to the point youwant to measure from, and pressENTER.4. Move the arrow to another point.The distance appears on the map.Customizing Data Fields on theMapYou can display up to four data fieldsat the top of the map to provide traveland navigational information.1. From the main menu, select Setup> Map > Data Fields.2. Select the number of data fields.3. Press MAP > MENU.4. Select Change Data Fields.5. Select a field.A list of data field options appears(page 69).6. Select an option.Find MenuYou can use the Find menu to searchfor waypoints, cities, and coordinates.You can download and navigateto photos, tracks, and geocaches.Additional categories appear if youhave optional, compatible detailedmaps loaded on the device. When youopen a category, the list contains itemsnear your current location or the mappointer (if active).Navigating to a DestinationYou can navigate to a destination usingthe map or compass.1. From the main menu, select Find.2. Select a category.