There must be a way to tranfer, copy, link, use detail (detail lines, hatches, groups, etc) components from one project to a linked project (site plan to building plan and vice versa). I can't find it. Even model lines (as opposed to detail lines) don't show up from the source to the linked project. Lines are "on" in RVT links display settings. Can anyone suggest a solution? for lines I end up creating models in the source project then tracing them in the destination project. Silly.