You can change the display characteristics of labels for contour lines.
For example, you can use a different font, size, or typeface setting (such as bold or italics). Also, you can specify label units and whether labels display for primary contour lines only, or for both primary and secondary contour lines.
To learn how to define display intervals for contour lines or to add custom contour lines to a site plan, see Define Site Settings.
To change the appearance of contour line labels
Revit displays labels for the contour lines using the new parameters.