Unit - night-ghost/minimosd-extra GitHub Wiki
Introduction
You can set MinimOSD-Extra to show units that you re familiar with.
http://gabek.dyndns.org:28/wiki/7.PNG
It can be set to use metric or imperial system.
If you have set metric, than speed will be in Km/h and altitude in metres. If you have set imperial, than speed will be in mph and altitude in feat.