Setting preferred units in Eagle CAD to metric or imperial

If you want to set Eagle CAD to display units in either metric or imperial, there is a simple command to do this.

SET Interface.PreferredUnit n

where n can be:
0 - the default value. Eagle decides if will display metric or imperial
1 - imperial
2 - metric

To change current units in Eagle CAD, simply paste the command in the command line, replace the n with your preferred value and press enter. To confirm that it worked, open the DRC window.

Imperial units in Eagle CAD DRC window

Metric units in Eagle CAD DRC window