CADWorx Structure tab: Drawings > Annotate Elevation 
Structure menu: Text > Annotate > Elevation
Command line: SELEVANOT
Places component elevation annotation.
Options
BOS
Labels the bottom of the steel elevation.
TOS
Labels the top of the steel elevation.
Centerline
Labels the centerline elevation.
Justify
Allows five different justifications according to the CAD standards. For more information please refer to the CAD documentation.
Leader
Adds a leader to the text.
Start point
Specifies the starting point for the text.