Desktop
With a model open, use the Settings 
panel to:
- Change the units of measurement you’d like to use in your model.
- Choose how many decimal places to display.
Notes:
- Updates are automatically saved until they're modified again.
- Anyone with access to a shared model can update the settings. Once modified, the units are updated for everyone.
- When you change the settings, they are not only applied to measurement, but they’re applied to the distance used for the Show Nearby and Show Only Nearby commands.
Mobile
Currently, you can only modify settings in a desktop environment.