The 철근표 has a selection checkbox per row. Select-all / clear and 선택만 보기 sit above the table. In 선택만 보기 the other bars are hidden in 3D and the members stay at 50% for context. A 3D click or an alert [보기] selects one bar; the selection clears when the member tab or the pier changes. The selection is screen state and is not saved to the project. Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>