I have a garmin 450 and added city navigatoor, washington topo and northwest trails. When all are enabled I don't see the topo lines on the map. I must disable city navigator to view wash topo. Is there any way of seeing both together?
You can only see more than one map if one of them is transparent. Washington topo isn't so you'll need to disable the other maps to see it.
Disable city navigator and you should be able to see (view) both the WA topo and northwest trails. The trails map is transparent so it should work with either.