Coping can be applied to steel members of the model, such as beams and columns.
For example, in locations where beams frame into girders, Revit can cope the beam around the girder. To see coping, the view Detail Level must be Medium or Fine. (See Detail Level.)

Beam before coping is applied (left) and after coping is applied (right)
To apply coping
 Geometry panel
Geometry panel Cope drop-down
Cope drop-down
 (Apply Coping).
 (Apply Coping). For more information about beam parameters, see Beam Instance Properties.
To remove coping
 Geometry panel
Geometry panel Cope drop-down
Cope drop-down
 (Remove Coping).
 (Remove Coping).