Casual feature request: I'd love to be able to expand on the included icon set by adding in my own waypoint/POI icons.
It's not supported, but you can sort of do that now. The waypoint symbols are all SVG files created with the free "Inkscape" program.
I say "sort of" because the SVG rendering engine I'm using is really really picky about what is contained inside the SVG files and tends to create all sorts of lame renderings of them if it finds something in the SVG it doesn't support. The SVG rendering engine is being replaced in the next version. I always intended the POI symbols to be user extensible, and once the engine is updated I'll document the process and support it. For now you are on your own on the "bleeding edge".
So, roughly:
Install Inkscape
Go into C:\Program Files\Spatial Minds\Overland Navigator\Symbols\Default\Point
Copy one of the existing SVG files to the new symbol you want
Edit the new symbol in Inkscape and save it.
There are additional symbols in the following directories:
C:\Program Files (x86)\Spatial Minds\Overland Navigator\Symbols\APRS\Point
C:\Program Files (x86)\Spatial Minds\Overland Navigator\Symbols\Garmin\Point
The Garmin symbols have some rendering artifacts that show up when displayed in the symbol picker but that look OK when rendered on the map.
Hope that helps you get setup with additional symbols. If you make any additional symbols and want to share them with others, let me know and I'll make them available for download on the SpatialMinds.com website.
Have fun!
Craig