Activate the PN-20
Now it's time to activate the PN-20 itself which needs to work in conjunction with the Topo USA software on your computer initially. Connect the USB cord to the device and the computer. Press and hold the PN-20 power button until the Welcome Screen appears on the device display. Click the Exchange button in the tool box of Topo USA. When a dialogue box appears on your computer with two sets of menus (left menu is for Topo USA, right menu for PN-20 data) your device is activated. Close the box and now we’re ready to plan your first outing; a hike sounds good. Just so you know, once you’ve followed the easy way to set up your Earthmate PN-20 GPS here, read how the device’s buttons and menus work by reading Tips on How to Use EarthMate GPS Devices.
Find the trail you want to hike on Topo USA, then the click Find tab, and type in location in the Search For box. Once it finds it, double click on it and the map automatically re-centers on that location. With the PN-20, you get to choose from any of the following viewing options; High-Resolution Aerial Photography, USGS Topo maps, DeLorme Topo maps, or Satellite imagery. Click the Net Link tab, then Data Sets. Use the Selection tool to select the area you'd like to download (the larger the areal you select, the longer it takes to download). Click Add to List, then name the packet, then hit Okay. You'll use the certificate we talked about above or you'll have to pay for the Aerial Imagery.
Now it's time for adding waypoints to mark routes. Click the Draw Tab, click the Waypoint symbol and the PN-20 from Symbols list. The trail head can be marked with the Parking Lot symbol you find on the Symbols list. Enter the name for the trailhead under that symbol .You then have the options to choose the waypoint symbol for where this trail goes such as the Mountain Top symbol. Name the destination waypoint, then right click on Parking Lot symbol and select Create Route, Set As Start, then right click the Mountain Top symbol Set As Finish. Name the route by typing it into the Name Field. Now you're all set to go. DeLorme also provides helpful YouTube videos which show you how to upload imagery to the PN Series along with other tutorial to help you get started and acquainted. Good luck and happy trails.