The Ruler preference settings enable you to change the default Ruler measurement units and display the settings.
The Ruler preferences settings include the Ruler display settings and the Ruler measurement units.
To access the Ruler preferences, do either of the following:
) arrow (context menu) in the Camera View Display toolbar options (
) and choose Preferences from the context menu.
Ruler tool context menu
Preferences and in the Preferences window, click the Ruler preference option.
Ruler preferences
The following tables describe the Ruler preference settings.
The Ruler measurement unit options include Architectural (feet and inches), mi (miles), cm (centimetres), m (metres), and km (kilometres). The default measurement unit is set to Architectural unit. The Architectural measurement unit is imperial.

You can specify the measurement unit precision for each of these options. The following table shows the Ruler measurement unit precision options for each of the measurement units.
See Changing the Ruler preferences.
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