Cycles the displayed bar in the rebar set presentation.
The direction in which the step is taken follows the rebar set distribution vector, i.e. starts from the Rebar Plane, ends at the Out of Plane Extent. Thus which bar is next or previous is independent of the left and right directions of the current view.
You can focus the command on a subset of elements by selecting them either before or after starting the command. By finishing the pick selection empty, you get the option to execute the command on all elements in the view. If the active view is a sheet, the command processes all eligible viewports.
The command can be executed also with Rebar Tags and Multi Rebar Annotations selected.