Small APRS Tracker manual:
http://www.oh5x.com/files/Tracker_Ver_2_1.pdf

Programming guide:
http://www.oh5x.com/files/Tracker_Programming.pdf

Opentracker+ manual:
http://www.argentdata.com/support/otplus-manual.pdf

Opentracker configuration software:
https://www.argentdata.com/support/firmware/otwincfg.exe

Sample cfg file:
www.oh5x.com/files/sample.cfg
Download this file to your computer by right-clicing it and save as...
Open it with otwincfg software to see how it is configured.
Use OFFLINE button of the software to open.

Symbols that can be displayed on maps:
www.oh5x.com/files/aprs_symbols.pdf