Revit should have a rebar layer parameter by default for defining slab rebar location: Bottom rebar row 1, bottom rebar row 2, top rebar row 1, top rebar row 2, supplementary extra rebar row 1 / 2, etc. Similar for walls: vertical rebar inner face, vertical rebar outer face, horizontal rebar inner face, horizontal rebar outer face. Other layer should be for spacers and/or ties. Sofistik has such option.
In large elements like slabs or concrete cores there are lots and lots of rebars. Assigning all those rebars to a partition doesn't help too much. Rebars and rebar tags together is just too much for one single drawing. We need to split-display rebars across multiple drawings by using rebar layers. We need to display certain rebar layers in certain drawings for technological reasons and resource scheduling/management.
Hiding rebar marks manually is just too tedious and senseless. 'Filtering rebars by layer' option would be awesome.
