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I am a new user. I have the City Navigator map and the Garmin 100k topo maps. I have downloaded the California Topo maps.

I am curious if users are running multiple map layers. I switch from car to hiking on a trip and run all the maps at once. However, it does seem to make the screen a bit complicated. I also noticed that there are two topo maps apparently, one with elevations and one with trails and roads.

What do you experienced users recommend in terms of selecting and running multiple maps? Are there other problems besides a jumbled screen?  If I run multiple maps and turn down the map detail, will that effect the topo map?

Thanks for this site and this forum - it has been a big help.

Nuvi 500, California and Oregon Topo maps. using Basecamp.  Windows 7/64.

FYI, I had to format the SD card before the maps would be recognized. Prior to formatting the card, Basecamp downloaded the maps and they showed up on the card but the Nuvi could not read them.