What must be added to a dimension type to show both imperial and metric units?

To show both imperial and metric units in a dimension type, it is necessary to utilize the feature known as Alternate Units. When configuring dimensions in Revit, the Alternate Units option allows you to define a secondary unit of measurement in addition to the primary one. By enabling this feature, users can display dimensions in both formats, such as feet and inches alongside millimeters or centimeters, depending on their project requirements.

This is particularly useful in projects that require clarity for different audiences, ensuring that both imperial and metric measurements are readily available for review and understanding. The alternate units can be customized to meet specific preferences relating to the presentation of dimensions, enhancing the overall utility of the dimensioning system within Revit.

In contrast, the other options do not directly facilitate the display of both measurement systems. An Equality Formula pertains to ensuring that two dimensions have the same length and does not relate to unit types. Units Format deals with the overall settings for how units are displayed but does not combine metrics and imperials in the same dimension. A Text Note is a manual way to add information but does not automatically integrate with the dimension itself to display dual units.