Use the Applied Moment subnode to apply moments on a rigid domain. The moment that you specify is interpreted in the selected coordinate system.
The Coordinate system list contains all applicable coordinate systems in the model. Select a
Coordinate system for specifying the directions of the moment.
If you are performing a linear buckling analysis with a combination of live and dead loads, select the Treat as dead load check box to indicate that the load contributions from this node are constant. The default is that a load is proportional to the load factor.
Physics tab with Rigid Material node selected in the model tree: