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In ASD Steel is in the upper part of the "Tools" Ribbon (see atached ASD3.jpg). Also you can enter _rbctoi in the command line.
In ASD Reinforcement you can find it under "Tools" ->Show/Hide Object inspector (see atached ASD4.jpg).
If the inspector still doesn' show, that means it is very small (thin) in the left part of the window. "Maximize" and "Restore down" until you can see it.